Which of the following regulates the amount of light entering the eye?

Iris

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Lens

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Retina

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Cornea

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Solution

The correct option is A Iris
The iris is the ring of pigmented tissue surrounding the pupil that varies in color. The iris opens and closes to control the amount of light entering the eye through the pupil. The pupil is the opening in the center of the iris where light enters the eye.
So, the correct answer is 'Iris'.

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