LU B.Sc Entrance Previous Year Question Paper Pattern – Model Paper Set 3 (2027) with Answers

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Q1. Which part of the heart secretes a hormone (ANF)?

1. (A) SA node
2. (B) Atrial wall
3. (C) Bundle of His
4. (D) Ventricular wall

Q2. Reabsorption of glucose from the glomerular filtrate in the kidney tubule takes place by

1. (A) Active transport
2. (B) Ultrafiltration
3. (C) Simple diffusion
4. (D) Osmosis

Q3. During meiosis-I, bivalent chromosomes clearly appear as tetrads during

1. (A) Pachytene
2. (B) Leptotene
3. (C) Zygotene
4. (D) Diakinesis

Q4. During muscle contraction, actin and myosin together form

1. (A) Actomyosin
2. (B) Troponin
3. (C) Myoglobin
4. (D) Tropomyosin

Q5. The disease chikungunya is transmitted by ?
चिकनगुनिया रोग किसके द्वारा फैलता है ?

1. (A) Houseflies
2. (B) Aedes mosquitoes
3. (C) Culex mosquitoes
4. (D) Anopheles mosquitoes

Q6. In which phase of meiosis are there two cells, each with sister chromatids separating and moving to opposite poles?

1. (A) Metaphase II
2. (B) Telophase I
3. (C) Anaphase II
4. (D) Prophase II

Q7. Crossing over is found in ?
क्रॉसिंग ओवर किस अवस्था में होता है ?

1. (A) Diplotene
2. (B) Pachytene
3. (C) Zygotene
4. (D) Leptotene

Q8. The largest number of animal species belongs to the phylum

1. (A) Annelida
2. (B) Mollusca
3. (C) Chordata
4. (D) Arthropoda

Q9. Chromosomes appear single, thin and thread-like during

1. (A) Pachytene
2. (B) Leptotene
3. (C) Diakinesis
4. (D) Zygotene

Q10. During depolarisation of a nerve fibre, the outer surface of the membrane becomes

1. (A) Negatively charged
2. (B) Unchanged
3. (C) Neutral
4. (D) Positively charged

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Q11. The most important component of oral contraceptive pills is ?
मौखिक गर्भनिरोधक गोलियों का सबसे महत्वपूर्ण घटक क्या है ?

1. (A) Progestogen-estrogen
2. (B) Only oxytocin
3. (C) Relaxin
4. (D) Prolactin

Q12. The tiny finger-like structure lying at the upper junction of the two labia minora is the

1. (A) Clitoris
2. (B) Cervix
3. (C) Hymen
4. (D) Fimbriae

Q13. Sea -hare is the common name of ?
सी-हेयर (Sea-hare) किसका सामान्य नाम है ?

1. (A) Aplysia
2. (B) Dentalium
3. (C) Pila
4. (D) Octopus

Q14. The genetic material of prokaryotic cells is called ?
प्रोकैरियोटिक कोशिकाओं की आनुवंशिक सामग्री को क्या कहते हैं ?

1. (A) Nucleolus
2. (B) Nucleoid
3. (C) Plasmid only
4. (D) Nucleus

Q15. Closely related, morphologically similar, reproductively isolated sympatric populations are designated as ?
निकट संबंधी, आकृति में समान, जनन रूप से पृथक सहभोगी समष्टियों को क्या कहा जाता है ?

1. (A) Sibling species
2. (B) Hybrids
3. (C) Subspecies
4. (D) Allopatric species

Q16. A decrease in blood pressure/volume will NOT cause the release of

1. (A) Renin
2. (B) Atrial natriuretic factor
3. (C) ADH (vasopressin)
4. (D) Aldosterone

Q17. The major reservoir of sulphur in nature is

1. (A) Ocean water
2. (B) Living organisms
3. (C) Atmosphere
4. (D) Rocks

Q18. The vertebrate group characterised by crop and gizzard in the digestive system is

1. (A) Amphibia
2. (B) Reptilia
3. (C) Mammalia
4. (D) Aves

Q19. The longest phase of meiosis is

1. (A) Metaphase I
2. (B) Prophase – I
3. (C) Anaphase II
4. (D) Telophase II

Q20. The four daughter cells produced at the end of meiosis are

1. (A) Genetically dissimilar
2. (B) Diploid
3. (C) Identical to the parent
4. (D) Genetically identical

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Q21. In adult human females, the hormone that causes strong uterine contractions during parturition is

1. (A) Progesterone
2. (B) Prolactin
3. (C) Oxytocin
4. (D) Estrogen

Q22. The brain capacity of Homo erectus was about

1. (A) 1650 cc
2. (B) 900 cc
3. (C) 650–800 cc
4. (D) 1400 cc

Q23. Which of the following is a part of the pectoral girdle?

1. (A) Ilium
2. (B) Glenoid cavity
3. (C) Sternum
4. (D) Acetabulum

Q24. The chromosome number is reduced to half during

1. (A) Metaphase I
2. (B) Anaphase-I
3. (C) Anaphase II
4. (D) Zygotene

Q25. Which ecosystem is expected where evaporation exceeds precipitation?

1. (A) Desert
2. (B) Tropical rainforest
3. (C) Grassland
4. (D) Tundra

Q26. Ability of the host to fight the disease causing organisms refers to the term ?
रोगकारक जीवों से लड़ने की परपोषी की क्षमता किस शब्द से संदर्भित है ?

1. (A) Immunity
2. (B) Infection
3. (C) Allergy
4. (D) Inflammation

Q27. Which gas binds to haemoglobin several hundred times more strongly than oxygen?

1. (A) CO
2. (B) SO₂
3. (C) N₂
4. (D) CO₂

Q28. The functional unit of the kidney is

1. (A) Villus
2. (B) Alveolus
3. (C) Neuron
4. (D) Nephron

Q29. Insulin is secreted by

1. (A) Beta cells of islets of Langerhans
2. (B) Alpha cells of islets
3. (C) Thyroid
4. (D) Adrenal cortex

Q30. The pacemaker of the human heart is the

1. (A) SA node
2. (B) AV node
3. (C) Bundle of His
4. (D) Purkinje fibres

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Q31. A moss sperm (antherozoid) moves by means of

1. (A) Pseudopodia
2. (B) Water currents only
3. (C) Cilia
4. (D) Flagella

Q32. Electrophoresis is used to separate molecules such as

1. (A) Only lipids
2. (B) Only vitamins
3. (C) DNA, RNA, Protein
4. (D) Only carbohydrates

Q33. Fewer than six radial vascular bundles are present in the

1. (A) Monocot root
2. (B) Dicot stem
3. (C) Dicot Root
4. (D) Monocot stem

Q34. Plants having little or no secondary growth are

1. (A) Mango tree
2. (B) Banyan tree
3. (C) Grasses
4. (D) Neem tree

Q35. The fungus that causes white rust of crucifers (mustard) is

1. (A) Puccinia
2. (B) Albugo candida
3. (C) Phytophthora
4. (D) Ustilago

Q36. Deserts, rainforests, tundra, etc, are examples of ?
मरुस्थल, वर्षावन, टुंड्रा आदि किसके उदाहरण हैं ?

1. (A) Population
2. (B) Community
3. (C) Biome
4. (D) Species

Q37. The two thecae of an anther are separated by a

1. (A) Longitudinal groove
2. (B) Tapetum
3. (C) Endothecium
4. (D) Connective

Q38. Senescence (ageing) of leaves is delayed by the application of

1. (A) Cytokinin
2. (B) Ethylene
3. (C) Abscisic acid
4. (D) Auxin

Q39. Electron Transport System (ETS) is located in mitochondrial ?
इलेक्ट्रॉन परिवहन तंत्र (ETS) माइटोकॉन्ड्रिया के किस भाग में स्थित होता है ?

1. (A) Inner membrane
2. (B) Outer membrane
3. (C) Matrix
4. (D) Intermembrane space

Q40. Lactic acid bacteria convert milk to curd and improve its nutritional quality by increasing

1. (A) Vitamin B₁₂
2. (B) Vitamin A
3. (C) Vitamin C
4. (D) Vitamin D

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Q41. In the names Mangifera indica, Solanum tuberosum and Panthera leo, the words indica, tuberosum and leo are

1. (A) Specific epithets
2. (B) Family names
3. (C) Order names
4. (D) Generic names

Q42. Which of the following is NOT a nitrogen-fixing organism?

1. (A) Anabaena
2. (B) Pseudomonas
3. (C) Azotobacter
4. (D) Rhizobium

Q43. The equipment essential for growing microbes on a large industrial scale is a

1. (A) Electrophoresis unit
2. (B) Bioreactor
3. (C) Centrifuge
4. (D) Microscope

Q44. Which of the following diseases cannot be treated with antibiotics?

1. (A) Cholera
2. (B) Typhoid
3. (C) Tuberculosis
4. (D) Chicken pox

Q45. The total number of nuclei involved in double fertilisation in angiosperms is

1. (A) Six
2. (B) Five
3. (C) Four
4. (D) Three

Q46. A group of similar organisms capable of interbreeding and producing fertile offspring is a

1. (A) Order
2. (B) Species
3. (C) Genus
4. (D) Family

Q47. Synthesis of DNA from RNA is explained by ?
RNA से DNA का संश्लेषण किससे समझाया जाता है ?

1. (A) Transcription
2. (B) Reverse transcription
3. (C) Translation
4. (D) Replication

Q48. A comma-shaped bacterium is

1. (A) Spirillum
2. (B) Vibrio
3. (C) Bacillus
4. (D) Coccus

Q49. A transgenic crop that may help solve night blindness in developing countries is

1. (A) Bt brinjal
2. (B) Flavr Savr tomato
3. (C) Bt cotton
4. (D) Golden rice

Q50. Which step of respiration is amphibolic?

1. (A) TCA cycle
2. (B) Glycolysis
3. (C) Electron transport system
4. (D) Fermentation

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Q51. Leaf tendrils are present in

1. (A) Pisum
2. (B) Grapevine
3. (C) Opuntia
4. (D) Cucumber

Q52. Anaerobic respiration (glycolysis/fermentation) takes place in the

1. (A) Cytoplasm
2. (B) Ribosome
3. (C) Nucleus
4. (D) Mitochondrial matrix

Q53. Sweating profusely in a hot room is a ____ means of maintaining homeostasis.

1. (A) Physiological
2. (B) Morphological
3. (C) Evolutionary
4. (D) Behavioural

Q54. Microbes that enrich soil nutrients, such as Rhizobium and blue-green algae, are called

1. (A) Chemical fertilizers
2. (B) Biofertilizers
3. (C) Herbicides
4. (D) Biopesticides

Q55. Which is a free-living (non-symbiotic) nitrogen-fixing biofertilizer?

1. (A) Anabaena (in Azolla)
2. (B) Frankia
3. (C) Azotobacter
4. (D) Rhizobium

Q56. Photosynthesis takes place in the

1. (A) Nucleus
2. (B) Ribosome
3. (C) Chloroplast
4. (D) Mitochondria

Q57. Xylem mainly transports

1. (A) Water and minerals
2. (B) Gases
3. (C) Hormones only
4. (D) Food

Q58. Stomata are mainly found on

1. (A) Seeds
2. (B) Leaves
3. (C) Flowers
4. (D) Roots

Q59. The male reproductive part of a flower is the

1. (A) Sepal
2. (B) Petal
3. (C) Pistil
4. (D) Stamen

Q60. The plant hormone that promotes fruit ripening is

1. (A) Gibberellin
2. (B) Cytokinin
3. (C) Ethylene
4. (D) Auxin

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Q61. Magnetic nanoparticle tends to behave as larger particle because of phenomena called ________.
चुंबकीय नैनोकण किस परिघटना के कारण बड़े कण की तरह व्यवहार करता है ?

1. (A) Suspension / निलंबन
2. (B) Agglomeration / संपिंडन (एग्लोमरेशन)
3. (C) Dispersion / परिक्षेपण
4. (D) Dissociation / वियोजन

Q62. Ion association in electrolyte solution is given by :
विद्युत-अपघट्य विलयन में आयन संगुणन किससे दिया जाता है ?

1. (A) Vant'hoff theory / वांट हॉफ सिद्धांत
2. (B) Bjerrum theory / ब्जेरम सिद्धांत
3. (C) Debye-huckel theory / डिबाई-हकल सिद्धांत
4. (D) Electrolyte theory / विद्युत-अपघट्य सिद्धांत

Q63. Micelles from the ionic surfactants can be formed only above a certain temperature called as:
आयनिक पृष्ठसक्रियकों से मिसेल केवल एक निश्चित ताप के ऊपर बनते हैं, जिसे क्या कहते हैं ?

1. (A) Boyle's temperature / बॉयल ताप
2. (B) Inversion temperature / व्युत्क्रमण ताप
3. (C) Kraft temperature / क्राफ्ट ताप
4. (D) Transition temperature / संक्रमण ताप

Q64. A liquid organic compound that decomposes at its boiling point, can conveniently be purified by ?
एक द्रव कार्बनिक यौगिक जो अपने क्वथनांक पर अपघटित हो जाता है, उसे किस विधि से सुविधाजनक रूप से शुद्ध किया जा सकता है ?

1. (A) simple distillation / साधारण आसवन
2. (B) fractional distillation / प्रभाजी आसवन
3. (C) vacuum distillation / निर्वात आसवन
4. (D) all the above methods / उपरोक्त सभी विधियाँ

Q65. When for any atom in a molecule, an identical atom exists diametrically opposite this centre at an equal distance then the molecule has _______.
जब किसी अणु के किसी परमाणु के व्यासतः विपरीत समान दूरी पर एक समान परमाणु हो, तो अणु में क्या होता है ?

1. (A) Centre of symmetry / सममिति केंद्र
2. (B) Symmetry axis / सममिति अक्ष
3. (C) Identity / तत्समकता (identity)
4. (D) Plane of symmetry / सममिति तल

Q66. The anode mud in the electrolytic refining of silver contains ?
चाँदी के विद्युत-अपघटनी परिष्करण में एनोड मड में क्या होता है ?

1. (A) Au / Au
2. (B) Au, Pb / Au, Pb
3. (C) Zn, Cu, Au / Zn, Cu, Au
4. (D) Zn, Sn, Au / Zn, Sn, Au

Q67. A sample of mixture of molecules with various chain lengths and molar masses constitute _________.
विभिन्न श्रृंखला लंबाई और मोलर द्रव्यमान वाले अणुओं का मिश्रण क्या बनाता है ?

1. (A) Peptide / पेप्टाइड
2. (B) Monodisperse polymer / एकपरिक्षेपी बहुलक
3. (C) Polydisperse polymer / बहुपरिक्षेपी बहुलक
4. (D) Protein / प्रोटीन

Q68. Calcium carbide reacts vigorously with water to yield ?
कैल्शियम कार्बाइड जल के साथ प्रबल अभिक्रिया कर क्या बनाता है ?

1. (A) Ethane / एथेन
2. (B) Acetylene / एसीटिलीन
3. (C) Carbon / कार्बन
4. (D) Ethene / एथीन

Q69. Among pyridine, piperidine, pyrrole and quinoline, the least basic compound is

1. (A) Pyridine / पिरिडीन
2. (B) Quinoline / क्विनोलीन
3. (C) Pyrrole / पाइरोल
4. (D) Piperidine / पिपरिडीन

Q70. Which of the following is NOT a greenhouse gas?

1. (A) Helium
2. (B) Methane
3. (C) Carbon dioxide
4. (D) Nitrous oxide

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Q71. Calamine is the ore of:
कैलेमाइन किसका अयस्क है ?

1. (A) Zn / Zn
2. (B) Fe / Fe
3. (C) Ca / Ca
4. (D) Al / Al

Q72. Which of the following is not an antibiotic ?
निम्नलिखित में कौन प्रतिजैविक (antibiotic) नहीं है ?

1. (A) Oflaxins / ऑफ्लॉक्सासिन
2. (B) Ranitidine / रैनिटिडीन
3. (C) Tetracyclins / टेट्रासाइक्लिन
4. (D) Cefixime / सेफिक्साइम

Q73. The Aufbau principle implies that a new electron will enter an orbital for which :
ऑफबाऊ सिद्धांत के अनुसार नया इलेक्ट्रॉन किस कक्षक में प्रवेश करेगा ?

1. (A) The value of (n + l) is minimum / (n + l) का मान न्यूनतम हो
2. (B) The value of (n + l) is maximum / (n + l) का मान अधिकतम हो
3. (C) l has lower value / l का मान कम हो
4. (D) n has lower value / n का मान कम हो

Q74. In hydrogen peroxide, the hybridization involved in oxygen atoms is ?
हाइड्रोजन परॉक्साइड में ऑक्सीजन परमाणुओं में कौन-सा संकरण होता है ?

1. (A) sp2 / sp2
2. (B) sp / sp
3. (C) sp3 / sp3
4. (D) sp3d2 / sp3d2

Q75. Haemoglobin is a coordination compound of ?
हीमोग्लोबिन किसका उपसहसंयोजन यौगिक है ?

1. (A) Ni / Ni
2. (B) Mg / Mg
3. (C) Fe / Fe
4. (D) Ru / Ru

Q76. Galvanized iron is obtained by coating iron with a thin film of ?
गैल्वनीकृत लोहा, लोहे पर किसकी पतली परत चढ़ाकर प्राप्त किया जाता है ?

1. (A) Cu / Cu
2. (B) Al / Al
3. (C) Sn / Sn
4. (D) Zn / Zn

Q77. Libermann nitroso reaction is used for testing:
लीबरमान नाइट्रोसो अभिक्रिया किसके परीक्षण के लिए प्रयोग होती है ?

1. (A) Quaternary amines / चतुष्क ऐमीन
2. (B) Secondary amines / द्वितीयक ऐमीन
3. (C) Tertiary amines / तृतीयक ऐमीन
4. (D) Primary amines / प्राथमिक ऐमीन

Q78. A Friedal-Craft's reaction of benzene with dichloromethane in presence of anhydrous AICI produces ?
बेन्जीन की डाइक्लोरोमेथेन के साथ निर्जल AlCl3 की उपस्थिति में फ्रीडल-क्राफ्ट अभिक्रिया क्या बनाती है ?

1. (A) Benzyl chloride / बेन्जिल क्लोराइड
2. (B) Triphenylmethane / ट्राइफेनिलमेथेन
3. (C) Diphenylmethane / डाइफेनिलमेथेन
4. (D) Benzal chloride / बेन्जाल क्लोराइड

Q79. Valinomycin consists of :
वैलिनोमाइसिन किससे बना होता है ?

1. (A) Ca2+ / Ca2+
2. (B) Mg2+ / Mg2+
3. (C) Na+ / Na+
4. (D) K+ / K+

Q80. The unit of rate constant for a first-order reaction is

1. (A) mol L⁻¹ s⁻¹
2. (B) L mol⁻¹ s⁻¹
3. (C) s⁻¹
4. (D) mol² L⁻² s⁻¹

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Q81. A catalyst increases the rate of reaction by

1. (A) Increasing activation energy
2. (B) Lowering activation energy
3. (C) Increasing temperature
4. (D) Changing equilibrium constant

Q82. Le Chatelier's principle applies to

1. (A) Irreversible reactions
2. (B) Only gases
3. (C) Systems at equilibrium
4. (D) Only solids

Q83. The oxidation state of Mn in KMnO₄ is

1. (A) +7
2. (B) +6
3. (C) +4
4. (D) +5

Q84. Oxidation is defined as

1. (A) Loss of electrons
2. (B) Gain of electrons
3. (C) Gain of hydrogen
4. (D) Loss of oxygen

Q85. Lanthanide contraction is the reason why

1. (A) Noble gases are inert
2. (B) Na is reactive
3. (C) Carbon forms chains
4. (D) Zr and Hf have nearly the same radius

Q86. Which of the following is a valid keyword in 'C' language ?
'C' भाषा में निम्नलिखित में कौन-सा एक मान्य कीवर्ड है ?

1. (A) Floating / Floating
2. (B) Integer / Integer
3. (C) Void / Void
4. (D) Enumeration / Enumeration

Q87. Which one is used for complex scientific calculation ?
जटिल वैज्ञानिक गणना के लिए कौन-सी भाषा प्रयोग होती है ?

1. (A) COBOL / COBOL
2. (B) FORTRAN / FORTRAN
3. (C) PASCAL / PASCAL
4. (D) BASIC / BASIC

Q88. Which company developed “Swift" Programming Language ?
'Swift' प्रोग्रामिंग भाषा किस कंपनी ने विकसित की ?

1. (A) Google / Google
2. (B) Apple / Apple
3. (C) Microsoft / Microsoft
4. (D) Facebook / Facebook

Q89. Determine the decimal equivalent of (B14) . 16 ?
(B14)₁₆ का दशमलव तुल्यांक ज्ञात कीजिए ?

1. (A) 2386 / 2386
2. (B) 3268 / 3268
3. (C) 3286 / 3286
4. (D) 2836 / 2836

Q90. Which one of these stores more data than a DVD ?
इनमें से कौन DVD से अधिक डेटा संग्रहीत करता है ?

1. (A) Blue-Ray Disc / ब्लू-रे डिस्क
2. (B) Floppy / फ्लॉपी
3. (C) Compact Disc / कॉम्पैक्ट डिस्क
4. (D) Control Unit / कंट्रोल यूनिट

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Q91. What is the short form of programmable read- only memory ?
प्रोग्रामेबल रीड-ओनली मेमोरी का संक्षिप्त रूप क्या है ?

1. (A) RAM / RAM
2. (B) PPROM / PPROM
3. (C) ROM / ROM
4. (D) PROM / PROM

Q92. What are the list of coded instructions called ?
कूटबद्ध निर्देशों की सूची को क्या कहते हैं ?

1. (A) Computer Program / कंप्यूटर प्रोग्राम
2. (B) None of these / इनमें से कोई नहीं
3. (C) Computer / कंप्यूटर
4. (D) Language / भाषा

Q93. Which of the following medium is used between CPU & RAM to speed up the processing power of a CPU ?
CPU की प्रोसेसिंग शक्ति बढ़ाने के लिए CPU और RAM के बीच कौन-सा माध्यम प्रयोग होता है ?

1. (A) Cache Memory / कैश मेमोरी
2. (B) DRAM / DRAM
3. (C) Virtual Memory / वर्चुअल मेमोरी
4. (D) Flash Memory / फ्लैश मेमोरी

Q94. Which of the following is used to store date and time with milliseconds and time zone ?
मिलीसेकंड और समय क्षेत्र सहित दिनांक व समय संग्रहीत करने के लिए किसका प्रयोग होता है ?

1. (A) timestamp / timestamp
2. (B) int / int
3. (C) date / date
4. (D) float / float

Q95. Which one works as an output and input device ?
कौन-सा निर्गत (output) और निवेश (input) दोनों उपकरण के रूप में कार्य करता है ?

1. (A) Monitor / मॉनिटर
2. (B) Modem / मोडेम
3. (C) Mouse / माउस
4. (D) Scanner / स्कैनर

Q96. What is the value of three fourth of sixty per cent of 480?
480 के साठ प्रतिशत का तीन-चौथाई क्या है ?

1. (A) 216 / 216
2. (B) 214 / 214
3. (C) 212 / 212
4. (D) 218 / 218

Q97. When the price of a radio was reduced by 20%, its sale increased by 80%. What was the net effect on the sale value?

1. (A) 66% increase / 66% वृद्धि
2. (B) 44% increase / 44% वृद्धि
3. (C) 75% increase / 75% वृद्धि
4. (D) 44% decrease / 44% कमी

Q98. Madhur scored 101, 100, 96, 108 and 78 marks (total 483), which is 84% of the maximum total. What are the maximum marks per subject?

1. (A) 100 / 100
2. (B) 120 / 120
3. (C) 115 / 115
4. (D) 110 / 110

Q99. Find the simple interest on ₹5000 at 4% per annum for 5 years.

1. (A) 1100
2. (B) 200
3. (C) 1000
4. (D) 900

Q100. The average weight of 20 students is 55 kg. When the teacher's weight is included, the average increases by 1 kg. What is the teacher's weight?

1. (A) 77 kg
2. (B) 56 kg
3. (C) 76 kg
4. (D) 75 kg

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