question_answer

	Part of eye		Function
i	Iris	a	Controls the amount of light entering into the eye
ii	Cilliary muscle	b	Senses the real image
iii	Pupil	c	Controls the power of eye lens
iv	Retina	d	Controls the size of pupil

The alternatives in the given table can be correctly matched as (a) \[i\to a,ii\to c,iii\to b,iv\to d\] (b) \[i\to a,ii\to b,iii\to c,iv\to d\] (c) \[i\to d,ii\to c,iii\to a,iv\to b\] (d) \[i\to d,ii\to c,iii\to b,iv\to a\]

Answer:

Iris controls the size of the pupil which in turn controls the amount of light entering into the eye. Cilliary muscles compress the eye lens and control its power. A real image is formed on the retina. The function of retina is to sense this image and send signals to the brain through optic nerve.