During the night,when light intensity is low,light is detected by .....

Macula lutea is present in.

The function of the pupil is:

The retina is most sensitive at:

The part of the rabbit's eye that acts as the screen of a camera is the........

Which of the following statements is correct regarding the pupil of the human eye?
$(I)$. It is the aperture surrounded by the iris.
$(II)$. The diameter of the pupil is regulated by the muscle fibres of the iris.
$(III)$. It is a transparent crystalline structure attached to the ciliary body.
The correct option is: