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: Radiology
[{'content': 'The patient who had dental extraction before radiotherapy needs: \nSelect and explain. \nA. No time for healing, B. Adequate time for healing, C. Radiotherapy is not advised, D. Wait for one day to sta radiotherapy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Adequate time for healing', 'role': 'assistant'}]