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: Surgery
Following anterior dislocation of the shoul-der, a pt 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. Musculocutaneous nerve, C. Axillary nerve, D. Ulnar nerve
B: Musculocutaneous nerve
Answer: B: Musculocutaneous nerve 
Explanation: B i.e. Musculocutaneous nerve Flexion of the elbow is caused by biceps brachii (musculo cutaneous nerve), brachialis ( muscolo cutaneous nerve) and branchioradialis (radial nerve)Q. So the nerve injured may be either musculocutaneus or radial. So lets see the cutaneous nerve supply of these nerves.