Assertion (A) : In bright light the size of the pupil is small

Reason (R) : Pupil controls the amount of light entering to the eye

Explanation:

The pupils primary function is to regulate the amount of light that reaches the retina. In bright light, the muscles of the iris contract, reducing the pupil's size to prevent excessive light from entering and potentially damaging the retina. This reflex action is called the pupillary light reflex.

Both the assertion and the reason are correct, and the reason correctly explains why the pupil size reduces in bright light.

Correct Answer: (a) Both A and R are correct, and R is the correct explanation of A.