Multiple choice

By deficiency of which vitamin does night blindness occur?

  1. B

  2. A

  3. C

  4. D

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Vitamin A deficiency is a well-established cause of night blindness (nyctalopia). Vitamin A is essential for the formation of rhodopsin, the visual pigment in rod cells that enables vision in low light conditions. Vitamins B, C, and D have different functions and are not directly related to night vision.