Vitamin A defeciency leads to night-blindness. Which of the following is the reason for the disease ?

Options

A. rod cells are not converted to cone cells
B. rhodopsin pigment of rod cells is defective
C. melanin pigment is not synthesized in cone cells
D. cornea of eye gets dried

Answer

B

Explanation

Aldehyde form of vitamin A (Retinal) is required for synthesis of rhodopsin pigments of rod cells. Deficiency of vitamin A will lead to defective formation of rhodopsin.