The deficiency of which vitamin is responsible for night blindness?
D
Correct answer
Explanation
Night blindness (nyctalopia) is caused by Vitamin A deficiency. Vitamin A is essential for the production of rhodopsin, a pigment in the retina that helps with vision in low-light conditions. Deficiency leads to difficulty seeing in dim light and can progress to complete blindness if untreated. Vitamins B, E, and K have different functions in the body.