Which cranial nerve is affected in Bell's Palsy?

Correct option is C

Ans. (c)
Sol. Bell's Palsy is caused by dysfunction or inflammation of the 7th cranial nerve (Facial nerve), which controls the muscles of facial expression. This condition results in sudden, unilateral facial paralysis or weakness, often appearing overnight. The exact cause may be viral in origin, and most cases resolve spontaneously over weeks to months.
Explanation of each option:
· (a) Cranial nerve IX (Glossopharyngeal) – Involved in taste and swallowing; not responsible for facial movement.
· (b) Cranial nerve IV (Trochlear) – Controls the superior oblique muscle of the eye; not linked to Bell’s Palsy.
· (c) Cranial nerve VII (Facial nerve) – Correct answer. Controls facial muscles; damage leads to Bell’s Palsy.
· (d) Cranial nerve XII (Hypoglossal) – Controls tongue movement; not involved in Bell’s Palsy.