The number of cranial nerves in man is
12 pairs
The correct option is B.
Explanation of the correct option :
Explanation of the incorrect option:
Option A:
There are 10 pairs of cranial nerves present in Amphibia.
Option C:
There are 31 pairs of spinal nerves present and not cranial nerves.
Option D:
Cranial nerves are totally 24 in number and not 24 pairs.
Final answer: The number of cranial nerves in man is 12 pairs.