A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin D
Correct Answer:
Option A – Vitamin A
Explanation
Vitamin A is a group of unsaturated nutritional organic compounds that includes retinol, retinal, retinoic acid, and several pro-vitamin A carotenoids (most notably beta-carotene). Vitamin A has multiple functions: it is important for growth and development, for the maintenance of the immune system and good vision.
Vitamin A that is important in the production of visual pigment