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: ENT
Tonsils reach their maximum size by - 
Select and explain. 
A. 1 years, B. 3 years, C. 5 years, D. 12 years
D: 12 years
Answer: D: 12 years 
Explanation: Growth of tonsils is very rapid from birth to 3 years and then again from 7 to 12 years.
Thereafter, the tonsils atrophy.