Question

Out of 12 cranial nerves; how many are sensory nerves?

• A. 3
• B. 5
• C. 4
• D. 7

Answer 1

The correct option is A 3

In reptiles, birds and mammals, 12 pairs of cranial nerves are present. They are olfactory (first cranial nerve), optic (second cranial nerve), oculomotor (third cranial nerve), trochlear (fourth cranial nerve), trigeminal (fifth cranial nerve), abducens (sixth cranial nerve), facial (seventh cranial nerve), auditory (eighth cranial nerve), glossopharyngeal (ninth cranial nerve), vagus (tenth cranial nerve), spinal accessory nerve (eleventh cranial nerve), hypoglossal (twelfth cranial nerve). The first, second and eighth cranial nerves are exclusively sensory in nature. The third, fourth, sixth, eleventh and twelfth cranial nerves are exclusively motor. The fifth, seventh, ninth and tenth cranial nerves are mixed nerves.