Night blindness occurs due to deficiency of which vitamin?

The correct option is B A

Night blindness also known as dark dysadaptation is a lack of ability to see clearly in dim light or difficulty in adapting to the change from low light to bright light. People with night blindness can also have problems with contrast vision.

Vitamin A Deficiency is an early sign of night blindness. The human body uses vitamin A to make retinal, part of a molecule called rhodopsin. It is found in the rods in the eye, the cells in the retina and allow people to see in low light.

Food components which are rich in vitamin 'A' as like carrots, green vegetable, spinach, eggs, papaya, mango etc. must be taken in adequate quantity to prevent night blindness.