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Which of the following statements is incorrect about cones?

(i) The daylight vision and colour vision are function of cones.

(ii) In human eye, there are three types of cones having characteristic photopigments that respond to red, green and blue light.

(iii) The sensations of different colours are produced by various combination of these 3 types of cones.

(iv) When these 3 types of cones are stimulated equally, a sensation of white light is produced.

A) Only (iv)        

B)        Only (i) and (iv)

C) Only (iii)        

D)        none of these