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': 'True about carbuncle is all except \nSelect and explain. \nA. Infective gangrene of skin and subcutaneous tissue, B. Nape of neck is common site, C. Cribriform rash is seen, D. Pseudomonas aeruginosa is common causative', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Staphylococcus aureus is main cause of carbuncle.', 'role': 'assistant'}]