Musculocutaneous nerve is injured at the lateral cord of brachial plexus, positive clinical findings would be :: (A) Loss of flexion at shoulder, (B) Sensory loss on the radial side of the forearm, (C) Loss of extension of forearm, (D) Loss of extension of the wrist
Answer is B. Musculocutaneous nerve supplies biceps and brachialis. It also gives sensory supply along the radial side of forearm. When it is damaged, it might show the following :

Flexion at elbow weakened (Biceps & Brachialis).
Supination of semiflexed elbow is affected (Biceps).
Sensory loss on radial side of forearm.