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': 'The term orthodontics was coined by: \nSelect and explain. \nA. Lefelon of France, B. Hunter, C. Carabeli, D. Norman kingsley', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]