Important MCQs on Vitamins, Diseases, and Deficiency Disorders for Competitive Exams – WBSSC, SSC, UPSC, Railways

  1. Which vitamin prevents scurvy?
    a) Vitamin A
    b) Vitamin C
    c) Vitamin D
    d) Vitamin K
    Answer: b) Vitamin C
  2. Which vitamin is also known as Thiamine?
    a) Vitamin A
    b) Vitamin B1
    c) Vitamin B2
    d) Vitamin B3
    Answer: b) Vitamin B1
  3. Beriberi disease is caused by the deficiency of:
    a) Vitamin B1
    b) Vitamin B6
    c) Vitamin B12
    d) Vitamin C
    Answer: a) Vitamin B1
  4. Riboflavin is the chemical name for which vitamin?
    a) Vitamin B1
    b) Vitamin B2
    c) Vitamin B3
    d) Vitamin B5
    Answer: b) Vitamin B2
  5. Deficiency of which vitamin leads to Pellagra?
    a) Vitamin B1
    b) Vitamin B2
    c) Vitamin B3
    d) Vitamin B5
    Answer: c) Vitamin B3
  6. Which vitamin aids in blood clotting?
    a) Vitamin C
    b) Vitamin D
    c) Vitamin K
    d) Vitamin E
    Answer: c) Vitamin K
  7. Night blindness is caused by the deficiency of:
    a) Vitamin A
    b) Vitamin B1
    c) Vitamin C
    d) Vitamin D
    Answer: a) Vitamin A
  8. Which vitamin is essential for the absorption of calcium and phosphorus?
    a) Vitamin A
    b) Vitamin C
    c) Vitamin D
    d) Vitamin K
    Answer: c) Vitamin D
  9. Which vitamin deficiency causes rickets in children?
    a) Vitamin A
    b) Vitamin C
    c) Vitamin D
    d) Vitamin E
    Answer: c) Vitamin D
  10. Which vitamin is water-soluble and destroyed by heat?
    a) Vitamin A
    b) Vitamin C
    c) Vitamin D
    d) Vitamin K
    Answer: b) Vitamin C
  11. Which vitamin is stored in the liver?
    a) Vitamin C
    b) Vitamin B1
    c) Vitamin D
    d) Vitamin B12
    Answer: d) Vitamin B12
  12. Which vitamin is produced in the human intestine by bacteria?
    a) Vitamin A
    b) Vitamin B12
    c) Vitamin K
    d) Vitamin C
    Answer: c) Vitamin K
  13. Which vitamin acts as an antioxidant?
    a) Vitamin A
    b) Vitamin B2
    c) Vitamin D
    d) Vitamin E
    Answer: d) Vitamin E
  14. Which vitamin is essential for maintaining healthy skin and nerves?
    a) Vitamin B1
    b) Vitamin B2
    c) Vitamin B3
    d) Vitamin B5
    Answer: c) Vitamin B3
  15. Which vitamin helps in the synthesis of nucleic acids?
    a) Vitamin A
    b) Folic Acid (Vitamin B9)
    c) Vitamin C
    d) Vitamin E
    Answer: b) Folic Acid (Vitamin B9)
  16. Which of the following disorders is caused by an excess of growth hormone in adults?
    a) Dwarfism
    b) Gigantism
    c) Acromegaly
    d) Myxedema
    Answer: c) Acromegaly
  17. Which vitamin is essential for the proper functioning of the retina in the human eye?
    a) Vitamin B
    b) Vitamin C
    c) Vitamin A
    d) Vitamin D
    Answer: c) Vitamin A
  18. What causes ‘Kwashiorkor’ in children?
    a) Deficiency of carbohydrates
    b) Protein deficiency in diet
    c) Excess of fats
    d) Lack of vitamins
    Answer: b) Protein deficiency in diet
  19. Which of the following is a genetic blood disorder characterized by abnormal hemoglobin?
    a) Hemophilia
    b) Leukemia
    c) Thalassemia
    d) Anemia
    Answer: c) Thalassemia
  20. Which of the following is a vector-borne disease?
    a) Tuberculosis
    b) Diabetes
    c) Dengue
    d) Goitre
    Answer: c) Dengue
  21. Which disease is also known as Hansen’s disease?
    a) Syphilis
    b) Typhoid
    c) Leprosy
    d) Tetanus
    Answer: c) Leprosy
  22. Rickets in children is caused by a deficiency of which vitamin?
    a) Vitamin A
    b) Vitamin D
    c) Vitamin K
    d) Vitamin E
    Answer: b) Vitamin D
  23. Night blindness is primarily associated with a deficiency of:
    a) Vitamin B12
    b) Vitamin D
    c) Vitamin A
    d) Vitamin K
    Answer: c) Vitamin A
  24. Which organ is affected by Hepatitis?
    a) Heart
    b) Kidney
    c) Liver
    d) Lungs
    Answer: c) Liver
  25. The causative agent of tuberculosis is:
    a) Salmonella typhi
    b) Mycobacterium tuberculosis
    c) Plasmodium vivax
    d) Vibrio cholerae
    Answer: b) Mycobacterium tuberculosis
  26. Goitre is caused due to the deficiency of which mineral?
    a) Iodine
    b) Iron
    c) Zinc
    d) Calcium
    Answer: a) Iodine
  27. Which of the following diseases is transmitted through contaminated water?
    a) Malaria
    b) Typhoid
    c) Chickenpox
    d) Measles
    Answer: b) Typhoid
  28. Which disease is caused by the protozoan Plasmodium?
    a) Dengue
    b) Typhoid
    c) Malaria
    d) Cholera
    Answer: c) Malaria
  29. Polio primarily affects which part of the body?
    a) Lungs
    b) Nervous system
    c) Digestive system
    d) Circulatory system
    Answer: b) Nervous system

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