[15]
The muscular diaphragm that controls the size of the pupil is called?

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Cornea

Ciliary muscles

Iris

Retina

answer is C.

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Detailed Solution

The muscular diaphragm that controls pupil size is called Iris.
Iris is one of the main parts of the eye. It is located in the front portion of the eye. Iris is accountable for the colour of the eye. It is the pigmented part of the eye that controls the diameter and size of the pupil.

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