Question

Which nerve supplies to the area marked as ‘Area B’ in the image:

• A. Ulnar nerve
• B. Median nerve
• C. Radial nerve
• D. Posterior interosseous nerve

Answer 1

The Correct Option is C

The correct nerve supplying the area marked as ‘Area B’ is the Radial nerve.

Explanation: The radial nerve is responsible for supplying the extensor muscles in the forearm and hand. It also provides sensory innervation to part of the dorsal surface of the hand and forearm. Given the options and the typical areas these nerves supply, the radial nerve is the appropriate choice as it often covers the dorsal aspect of the hand and forearm, corresponding to typical descriptions of 'Area B' in anatomical diagrams.

Options	Supply Area
Ulnar nerve	Medial forearm, little finger, and half of the ring finger (mainly palmar side)
Median nerve	Palmar surface of the thumb, index, middle, and half of the ring finger
Radial nerve	Dorsal surface of lateral hand and forearm
Posterior interosseous nerve	Branch of the radial nerve supplying muscles in the posterior compartment of the forearm

Understanding the function and typical regions of sensory innervation by each nerve helps in identifying which nerve supplies a given area.