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': 'After a major oral surgery, acute catabolic phase lasts for? \nSelect and explain. \nA. 1-2 days, B. 2-5 days, C. 4-7 days, D. 5-10 days', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]