This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Following anterior dislocation of the shoulder, a patient develops weakness of flexion at elbow and lack of sensation over the lateral aspect forearm : nerve injured is - 
Select and explain. 
A. Radial nerve, B. Musculocutanous nerve, C. Axillary nerve, D. Ulnar nerve
B: Musculocutanous nerve
Answer: B: Musculocutanous nerve 
Explanation: 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.