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
Crown completion of Maxillary lateral incisors occur 
Select and explain. 
A. At birth, B. 4-5 years, C. 6-8 years, D. 8-9 years
B: 4-5 years
Answer: B: 4-5 years 
Explanation: None