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': 'Infective gangrene of the subcutaneous tissue which often occurs in the nape of the neck \nSelect and explain. \nA. Boil, B. Furuncle, C. Carbuncle, D. Impetigo', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]