|A) the retina of the eye moves forward||B) the retina of the eye moves backward|
|C) the iris is unable to dilate the pupil immediately to be able to see things||D) the eye has no power of accommodation|
The size of the pupil of the eye automatically adjusts itself according to the intensity of light passing through it;if the intensity is more , the size is less, if less, it is more. So in our case the pupil should dilate i.e, increase in size to be able to see in the dark . This switchover takes sometime. But here the entry into the dark room is immediate . So the eye has no time to adjust itself and hence is not able to see at all for a while.