Q. When a person walking in bright Sunlight enters a dark room, he is not able to see clearly for a little while as

• (A) the iris is unable to dilate the pupil immediately.
• (B) the eye muscles cannot immediately adjust the focal length of the eye lens
• (C) the iris is unable to contract the pupil immediately.
• (D) the retina retains the bright images for sometime & becomes momentarily insensitive.