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 instrument best suited for root planning is: \nSelect and explain. \nA. Hoe, B. Scaler, C. File, D. Curette', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]