Multiple choice

The deficiency of _____ causes night blindness.

  1. Vitamin A

  2. Vitamin C

  3. Vitamin D

  4. Vitamin E
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vitamin A deficiency causes night blindness (nyctalopia) because retinal, a derivative of Vitamin A, is essential for the formation of rhodopsin (visual purple) in rod cells. Rod cells enable vision in low-light conditions. Vitamin C deficiency causes scurvy, Vitamin D deficiency causes rickets, and Vitamin E deficiency causes neurological problems.

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