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': 'Extractions can be done in ANUG patients after \nSelect and explain. \nA. 4 weeks, B. At 1st appointment only, C. 4 months, D. 1 week', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]