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Q.

The amount of light entering the eye can be adjusted and regulated by

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a

Cornea
 

b

Retina

c

Pupil
 

d

Iris
 

answer is A.

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Detailed Solution

Our eyes' iris is a power that controls the size of the pupil. It widens and narrows as a result of which the pupil's size changes. The pupil's size is controlled by the iris.

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