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2006 Section 2 Question 19

19) C

This is no longer on the BMAT syllabus.

However, you should have been able to at least eliminate options A and D.

This is because when levels of light are reducing, the pupil would get bigger (dilated) to allow more light to enter the eye.

To allow the pupil to dilate, the radial muscles need to contract and the circular muscles need to relax.

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