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': 'A carbuncle is treated by - \nSelect and explain. \nA. Incision and drainage, B. Cruciate incision and deroofing, C. Antibiotics alone, D. Wide excision', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Wide excision as treatment option was mentioned in 8th edition, but has been removed in the 9th edition.', 'role': 'assistant'}]