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
Growth of all permanent teeth except last molars is completed by: 
Select and explain. 
A. 6 years, B. 8 years, C. 12 years, D. 17 years
D: 17 years
Answer: D: 17 years 
Explanation: None