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 Canine occur 
Select and explain. 
A. At birth, B. 6-7 year, C. 2 ½ year, D. 8-9 year
B: 6-7 year
Answer: B: 6-7 year 
Explanation: None