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': 'Pre-auricular sinus \nSelect and explain. \nA. Is always unilateral, B. Usually painful, C. May be in close proximity to greater auricular nerve, D. Recurrence after excision is common', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]