If someone has a problem with colour vision due to defective receptors,which receptor could be the problem

A)  rods
B)  hair cells 
C)  cilia
D)  cones

Colour Vision

The ability of the eye and brain to perceive differences in wavelengths of light, enabling humans and other animals to see a variety of colors.

Defective Receptors

Abnormal proteins on the surface of cells that impair the cell's ability to respond to stimuli.