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
1st evidence of calcification of Upper 1st premolar is seen in 
Select and explain. 
A. at birth, B. 1-1 ½ year, C. 4 year, D. 2 years
B: 1-1 ½ year
Answer: B: 1-1 ½ year 
Explanation: None