The Fovea centralis is A. It is a region of a retina with only rod cellB. It is a region of the retina without sensory cellC. It is a region of the choroid with only cone cellD. It is a region of the retina with only cone cell

The correct answer is:

D. It is a region of the retina with only cone cells.

Here’s the detailed explanation:

The fovea centralis is a small pit located in the center of the retina, specifically in the macula lutea. It is the region of the retina responsible for sharp central vision. Unlike other areas of the retina, which contain both rod and cone cells, the fovea centralis contains only cone cells. These cone cells are responsible for color vision and high-resolution vision, making the fovea centralis essential for tasks such as reading and recognizing faces.

Rod cells, which are responsible for vision in low-light conditions, are found mainly in the peripheral regions of the retina, not in the fovea.
The fovea centralis does not lack sensory cells; rather, it specifically contains cone cells.
Therefore, the correct answer is D. It is a region of the retina with only cone cells.