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: Anatomy
[{'content': 'Branch of facial nerve in facial canal \nSelect and explain. \nA. Greater petrosal nerve, B. Nerve to Stapedius, C. Chordatympani, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A. i.e. Greater petrosal nerve; C. i.e. Chorda tympani; B . i.e. N. to stapedius', 'role': 'assistant'}]