The figure shows parts of the human eye labeled as $A, B, C$ and $D$. Select the option which correctly identifies the labeled part with its function and characteristics.

Which of these cells are not found in the retina?

Rods and cones are present in

Select the correct option based on the given sentences regarding the mechanism of vision:
$(I)$ Light rays in the visible wavelength are focused on the retina through the cornea and lens.
$(II)$ It generates impulses in rods and cones.
$(III)$ Photosensitive pigment is composed of an opsin (protein) and retinal (an aldehyde of vitamin $A$).
$(IV)$ Light induces the dissociation of retinal and opsin.
$(V)$ This process causes a change in membrane permeability,as a result,potential differences are generated in the photoreceptor cells.

The nictitating membrane, also known as the $Plica \text{ } semilunaris$, is a vestigial organ present in which part of the human eye?

In hypermetropia,the image is formed