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': 'Ideal age for the use of Detain facemask in the treatment of skeletal maxillary deficiency cases is in the: \nSelect and explain. \nA. 6 - 8 year old age group, B. 8 to 10 year old age group, C. 10 to 12 year old age group, D. 12 to 14 year old age group', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]