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': "Patey's operation is: \nSelect and explain. \nA. Superficial parotidectomy., B. Total parotidectomy., C. Deep parotidectomy., D. All of the above.", 'role': 'user'}, {'content': "Answer: A \nExplanation: Patey's operation is the treatment of choice for Pleomorphic adenoma.", 'role': 'assistant'}]