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
Duration of adolescent stage in boys is 
Select and explain. 
A. 3 years, B. 3-5 years, C. 4 years, D. 5 years
D: 5 years
Answer: D: 5 years 
Explanation: None