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': 'Primary dentition period is: \nSelect and explain. \nA. From birth to 11 years, B. From 6 months to 11 years, C. From 6 months to 6 years, D. From 6 years to 11 years', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]