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 photopigments are embedded in the membrane disc of the inner segment. C. Retinal is a derivative of Vitamin A. D. Retinal is a light-absorbing part of all the visual photopigments.

The correct option is C (A, C, and D)

The retina of the eyes has proteins called opsin which binds to the retinal. Retinal is the light-sensitive pigment. Vitamin A is necessary for the production of retinal, a component of rhodopsin. Rhodopsin is required for sensing dim light. Since deficiency of vitamin A leads to inadequate production of retinal, it results in poor vision. Carotenes are the pigments present in red-orange fruits and vegetables. Carotenes synthesize vitamin A derivatives. Thus, the correct answer is option C.