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: Orthopaedics
[{'content': 'Nerve supply of the marked muscle is by \nSelect and explain. \nA. Median nerve, B. Radial nerve, C. Ulnar nerve, D. Posterior interosseus nerve', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The muscle marked is 1st\xa0lumbrical, and is supplied by median nerve.', 'role': 'assistant'}]