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
A carbuncle is treated by - 
Select and explain. 
A. Incision and drainage, B. Cruciate incision and deroofing, C. Antibiotics alone, D. Wide excision
A: Incision and drainage
Answer: A: Incision and drainage 
Explanation: Wide excision as treatment option was mentioned in 8th edition, but has been removed in the 9th edition.