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
[{'content': '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: \nSelect and explain. \nA. Radial nerve, B. Musculocutaneous nerve, C. Axillary nerve, D. Ulnar nerve', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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.', 'role': 'assistant'}]