The deficiency of which of the following vitamins causes night blindness?

Vitamin A

The correct answer is Option (2)- Vitamin A

The deficiency of Vitamin A causes night blindness.

Night blindness is a condition where a person has difficulty seeing in low-light conditions, especially at night. Vitamin A plays a crucial role in maintaining the health of the eyes, particularly in the formation of rhodopsin, a light-sensitive pigment in the retina that is essential for vision in low-light conditions. When there is a deficiency of Vitamin A, the production of rhodopsin is impaired, leading to difficulties in seeing in dim light, which is characteristic of night blindness.

The other vitamins mentioned are not specifically associated with night blindness:

Vitamin B2 (Riboflavin): Deficiency of this vitamin can cause other eye-related issues, such as sensitivity to light and inflammation, but it is not directly linked to night blindness.

Vitamin E: This vitamin is important for overall eye health, but its deficiency is not a known cause of night blindness.

Vitamin D: Vitamin D is primarily associated with calcium absorption and bone health, and its deficiency does not directly lead to night blindness.