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: Forensic Medicine
[{'content': 'The period of mixed dentition is between the age of: UP 11 \nSelect and explain. \nA. 2-9 years, B. 6-11 years, C. 12-14 years, D. 16 years', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. 6-11 years', 'role': 'assistant'}]