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Question

The size of pupil is controlled by the _____________.

A
Ciliary muscles
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B
Suspensory ligaments
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C
Cornea
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D
Iris muscles
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Solution

The correct option is D Iris muscles
The size of pupil is controlled by two types of muscles of iris, circular muscles and radial muscles. Radial muscles contract in dim light and circular muscles contract in bright light.

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