A. Ciliary muscles
B. Pupil
C. Iris
D. Retina
Correct Answer: Option C
C. Iris
Explanation
Iris is similar to a diaphragm.
A. Ciliary muscles
B. Pupil
C. Iris
D. Retina
Correct Answer: Option C
C. Iris
Explanation
Iris is similar to a diaphragm.
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