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B
Rhodopsin pigment in cone cells
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C
Iodopsin pigment in rod cells
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D
Iodopsin pigment in cone cells
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Solution
The correct option is D Iodopsin pigment in cone cells
There are two types of photoreceptor cells in retina:
Rods: The photoreceptor cells that contain rhodopsin pigment and associated with scotopic vision of eye i.e. vision under low light.
Cones: The photoreceptor cells that contain iodopsin, porpyrosin and cyanopsin pigments. These cells are associated with the daylight vision and colour vision of eyes.
Hence, colour perception in humans is due to iodopsin in cone cells.
So, the correct answer is 'Iodopsin pigment in cone cells'.