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': 'latrogenic traumatic facial nerve palsy is most commonly caused during: \nSelect and explain. \nA. Myringoplasty, B. Stapedectomy, C. Mastoidectomy, D. Ossiculoplasty', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Other Operations where Facial Nerve may be Damaged- Stapedectomy- Removal of acoustic neuroma', 'role': 'assistant'}]