Good vision depends on adequate intake of carotene rich food. Select the best option from the following statements.
(a) Vitamin A derivatives are formed from carotene.
(b)The photo pigments are embedded in the membrane discs of the inner segments.
(c ) Retinal is a derivative of vitamin A
(d) Retinal is light absorbing part of all the visual photopigments.

Options

A. a, c and d
B. a and c
C. b , c and d
D. a and b

Answer

a