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 Lower 2nd premolar is seen in 
Select and explain. 
A. at birth, B. 16 wk IU, C. 1 year after birth, D. 2 ¼ - 2 ¾ years after birth
D: 2 ¼ - 2 ¾ years after birth
Answer: D: 2 ¼ - 2 ¾ years after birth 
Explanation: None