Retinal - part of the light sensitive pigment in the retina of eye.Oxidation of rational generates retinal,and when this is linked with a protein called opsin,it forms rodospin a light sensitive pigment.Rodospin is a pigment responsible for night vision and allow to see in black and white. So correct option is B.

The correct answer is option 'B' which is the retina.

The retina is the sensitive pigmented layer of the eye that plays a crucial role in vision. It is located at the back of the eye and consists of several layers of specialized cells that work together to convert light into electrical signals that can be interpreted by the brain.

The retina can be divided into several distinct layers, each with its own specific function. These layers include:

1. Pigmented Epithelium: This is the outermost layer of the retina and consists of a single layer of pigmented cells. These cells help to absorb excess light and prevent it from reflecting back into the eye, thus enhancing visual clarity.

2. Photoreceptor Layer: This layer contains two types of specialized cells called rods and cones. Rods are responsible for vision in dim light conditions, while cones are responsible for color vision and visual acuity. When light enters the eye and reaches the photoreceptor layer, it is absorbed by the rods and cones, triggering a series of chemical reactions that generate electrical signals.

3. Bipolar Cell Layer: The electrical signals generated by the rods and cones are then passed on to the bipolar cells. These cells act as intermediaries, transmitting the signals from the photoreceptor layer to the ganglion cell layer.

4. Ganglion Cell Layer: The ganglion cells receive the electrical signals from the bipolar cells and bundle them together to form the optic nerve. The optic nerve carries these signals to the brain, where they are interpreted as visual information.

In addition to these layers, the retina also contains other important structures such as the horizontal cells and amacrine cells, which help to modulate and refine the electrical signals before they are transmitted to the brain.

Overall, the retina is a highly specialized and complex structure that is essential for vision. Its sensitive pigmented layer, along with the other layers and cells, work together to convert light into electrical signals and transmit them to the brain, allowing us to perceive and interpret the visual world around us.