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
[{'content': 'Duration of adolescent stage in boys is \nSelect and explain. \nA. 3 years, B. 3-5 years, C. 4 years, D. 5 years', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]