Circular disc shaped structure with a round hole is ___________ ?
Correct answer: A. Iris
- A. Iris
- B. Pupil
- C. Horoid coat
- D. Ciliary body
Explanation
The iris is a circular muscular diaphragm containing a central opening called the pupil, and it regulates the amount of light entering the eye. The pupil itself is only the opening, not the disc-shaped structure, so students may choose pupil after focusing on the phrase “round hole.”
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