Good vision depends on adequate intake of cacotene rich food
Select the best option from the following statements
(A) Vitamin A derivatives are formed from carotene
(B) The photopigments are embedded in the membrane discs of the ineer segment
( C) Retinal is a derivative of Vitamin A
(D) Retinal is a light absorbing part of all the visual photopigments

Options

A. (I) and (II)
B. (I), (III) and (IV)
C. (I) and (III)
D. (II),(III)and (IV)

Answer

B

Explanation

Vitamin A is a group of unsaturated nutritional organic compounds that includes retinol, retinal, retinoic acid and `beta`-carotene.
Vitamin-A is needed by the retina of eye in the form of retinal, which combines with protein opsin to form rhodopsin, the light absorbing molecule.