What is correct for fovea?

Good vision depends on adequate intake of carotene-rich food. Select the best option from the following statements:
$(1)$ Vitamin $A$ derivatives are formed from carotene.
$(2)$ The photopigments are embedded in the membrane discs of the inner segment.
$(3)$ Retinal is a derivative of vitamin $A$.
$(4)$ Retinal is a light-absorbing part of all the visual photopigments.

When different cones of the human eye are stimulated equally,a sensation of ...... light is produced.

Which of the following is a correct difference between the rod cells and cone cells of our retina?

Acute vision is found in

Which part of the retina consists of only cones?