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': "Boucher's method of relining is a \nSelect and explain. \nA. Open mouth technique, B. Chair side relining technique, C. Functional relining method, D. Closed mouth relining technique", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]