Question

When a person walking in bright sunlight enters a dark room, he is not able to see clearly for a little while because; 1) the retina retains the bright images for sometimes and becomes momentarily insensitive.; 2) the eye muscles cannot immediately adjust the focal length of the eye lens.; 3) the iris is unable to dilate the pupil immediately; 4) the iris is unable to contract the pupil immediately

Answer 1

4) the iris is unable to contract  the pupil immediately.

Answer 2

Answer:

the iris unable to dilate the pupil immediately