How many pairs of cranial nerves are found in human

Options

(a) 10 pairs
(b) 11 pairs
(c) 12 pairs
(d) 13 pairs

Correct Answer:

12 pairs

Explanation:

12 pairs,There are two types of photoreceptor cells namely(i) Rods and (ii) Cones.These cells contain the light-sensitive proteins called the photopigments.The daylight (photopic) vision and colour vision twilight (scotopic) vision is the contains a purplish-red protein called the rhodopsin or visual purple,which contains a derivative of Vitamin-A.In human eye,there are three types of cones which possess their own characteristic photopigments that respond to red,green and blue lights.The sensations of diffe