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': 'Which of the following muscle is not a hybrid muscle \nSelect and explain. \nA. Pectoralis major, B. Extensor digitorum, C. Flexor digitorum profundus, D. Brachialis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Extensor digitorum Hybrid muscles are the muscles having more than one nerve supply Pctoralis major: lateral & medial pectoral nerves Brachialis: additional proprioceptive fibres from radial nerve, in addition to its muscular nerve, musculocutaneous nerve. Extensor digitorum is supplied by the posterior interosseous nerve only.', 'role': 'assistant'}]