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
Eruption of Maxillary 1st molar occur at 
Select and explain. 
A. 8-9 years, B. 6 years, C. 4 years, D. 15-16 months
B: 6 years
Answer: B: 6 years 
Explanation: None