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
Root completion of primary maxillay Lateral incisor tooth occurs at an age of 
Select and explain. 
A. 2-2 ½ year, B. 1-1 ½ year, C. 3-4 year, D. None of the above
A: 2-2 ½ year
Answer: A: 2-2 ½ year 
Explanation: None