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NDA 2021 GAT · General Knowledge · Nutrition, Diseases and Health · easy

Deficiency of which vitamin causes night blindness?

Single correct option

Deficiency of which vitamin causes night blindness?
  1. A. Vitamin B1
  2. B. Vitamin C
  3. C. Vitamin D
  4. D. Vitamin A
Show answer and solution

Answer: (D) Vitamin A

Vitamin A is needed to form rhodopsin, the pigment in rod cells that works in dim light. Its lack causes night blindness. B1 deficiency causes beri-beri, C deficiency causes scurvy, and D deficiency causes rickets.
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Original question written in the NDA 2021 GAT pattern and checked twice for the correct answer. Not an official question paper. How we write and check questions · Corrections policy · Report a mistake