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
[{'content': 'Tonsils reach their maximum size by - \nSelect and explain. \nA. 1 years, B. 3 years, C. 5 years, D. 12 years', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Growth of tonsils is very rapid from birth to 3 years and then again from 7 to 12 years.\nThereafter, the tonsils atrophy.', 'role': 'assistant'}]