Poor vision in humans can be due to the deficiency of `"__________"`

Options

A. Iron
B. Vitamin A
C. Iodine
D. Vitamin D

Answer

B

Explanation

A lack of vitamin A causes the cornea to become very dry, leading to clouding of the front of the eye, corneal drug and vision loss. Vitamin A deficiency also causes damag to the retina, which also contributes to blindness.