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
At what age does the permanent maxillary lateral incisors erupt 
Select and explain. 
A. 5 years, B. 7-9 years, C. 11 years, D. 13 years
B: 7-9 years
Answer: B: 7-9 years 
Explanation: None