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: Medicine
Acute rheumatic fever occurs most commonly in 
Select and explain. 
A. 5-14 yrs, B. 15-20 yrs, C. 21-25 yrs, D. 26-30 yrs
A: 5-14 yrs
Answer: A: 5-14 yrs 
Explanation: None