In the human retina: a) cone cells can detect color, but rod cells cannot. b) cone cells are more sensitive than rod cells to light. c) rod cells are most highly concentrated in the center of the retina. d) cone cells, but not rod cells, have a visual pigment.

option A

Explanation:

Cones provide colour vision while rods cells do not produce colour vision. Rods provide the vision in the dull light (darkness or night), whereas cones are known to give the vision during the day or bright light; Rod cells are more sensitive to light than cone cells and both do have visual pigments with the rod cells possessing rhodopsin and the cone cells having photo-opsins.

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