Q.

The deficiency of vitamin A causes –

A. night blindness
B. beriberi
C. rickets
D. pellagra
Answer» A. night blindness
Explanation: Nyctalopia (night blindness) is a condition making it difficult or impossible to see in relatively low light. It is one of the first signs of Vitamin A deficiency. Xerophthalmia, keratomalacia, and complete blindness can also occur since Vitamin A has a major role in phototransduction.
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