Question

Night blindness develops due to deficiency of ______.

• A. Vitamin C
• B. Vitamin $B_{12}$
• C. Vitamin K
• D. Vitamin A

Answer 1

The correct option is D Vitamin A

Night blindness prevents the person from seeing well at night or in poor lighting. Vitamin A is a precursor of rhodopsin, the photopigment found in rods within the retina of the eye that helps to see at night. So, vitamin A deficiency cause night blindness.

Vitamin C deficiency causes scurvy disease.

Vitamin $B_{12}$ deficiency causes pernicious anaemia.

Vitamin K deficiency causes blood clotting, haemorrhage.

Hence, the correct answer is option D.