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 Final Evaluation of the root surface smoothness after root planning is done by? \nSelect and explain. \nA. Probe, B. Explorer, C. Scaler, D. Curettes', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]