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: Dental
[{'content': 'Endodontic therapy should preferably be initiated within______ post trauma. \nSelect and explain. \nA. 2-3weeks, B. 3-4weeks., C. 2 months, D. 4 months.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]