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 3rd molar is seen in 
Select and explain. 
A. at birth, B. 7-8 year, C. 10 year after birth, D. 12 years after birth
B: 7-8 year
Answer: B: 7-8 year 
Explanation: None