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': 'Honing machine is used for: \nSelect and explain. \nA. CAD CAM Inlay fabrication, B. Polishing restorations, C. Mechanical sharpening of Instruments, D. Caries detection', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]