A) vitamin-A
B) vitamin-B
C) vitamin-C
D) vitamin-D
Correct Answer: A
Solution :
Vitamin-C is involved in formation of bone matrix and dentine. Vitamin-D is involved in absorption and retention of calcium and phosphate. Whereas vitamin-B prevents pellagra, beriberi diseases. Deficiency of vitamin-A causes toad skin ie, (dryness and scaly skin due to keratin deposition (keratomalasia), cells of the lacrimal glands become keratinized and stop secreting tears. Keratinization of skin is prevented by retinol or vitamin-A.
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