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
After the age of six the increase in the size of mandible
occurs at: 
Select and explain. 
A. Symphysis, B. Between canines, C. Along the lower border, D. Distal to 1st molars
D: Distal to 1st molars
Answer: D: Distal to 1st molars 
Explanation: None