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': 'At what age does the permanent maxillary lateral incisors erupt \nSelect and explain. \nA. 5 years, B. 7-9 years, C. 11 years, D. 13 years', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]