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': 'Age of adolescence: \nSelect and explain. \nA. 10-14 years, B. 14-20 years, C. 6-10 years, D. 1-3 years', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Infants\xa0(0 to 1 year\xa0old)\nToddlers\xa0(1 to\xa03 years old)\nPreschoolers\xa0(3 to 6 years old)\nSchool-aged children\xa0(6 to\xa012 years old)\nAdolescents (12 to\xa019 years old).', 'role': 'assistant'}]