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: Unknown
[{'content': 'All are contents of the middle ear except: \nSelect and explain. \nA. Stapedius, B. Tensor tympani, C. Facial nerve, D. Chorda tympani', 'role': 'user'}, {'content': 'Answer: C \nExplanation: All the other structures with the tympanic plexus is described as contents of the middle ear cavity\nThe facial nerve is described as a part of the medial and posterior wall of the tympanic cavit', 'role': 'assistant'}]