This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Which of the following nerves innervate a dermatome that doesn&;t lie superficial to its myotome? \nSelect and explain. \nA. Musculocutaneous nerve, B. Axillary nerve, C. Radial nerve, D. Ulnar nerve', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Musculocutaneous nerve (C5, C6, C7) arises from the lateral cord of brachial plexus leaves the axilla by piercing coracobrachialis muscle passes down the arm beneath biceps muscle and supplies it, supplies the brachialis muscle beneath bicepsends as the lateral cutaneous nerve of forearm innervates myotome in arm and dermatome in the forearm', 'role': 'assistant'}]