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': 'The most favoured treatment for pelvic abscess in cul - de - sac is \nSelect and explain. \nA. Laprotomy, B. Colpotomy, C. Incision and drainage, D. Antibiotic', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]