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
Honing machine is used for: 
Select and explain. 
A. CAD CAM Inlay fabrication, B. Polishing restorations, C. Mechanical sharpening of Instruments, D. Caries detection
C: Mechanical sharpening of Instruments
Answer: C: Mechanical sharpening of Instruments 
Explanation: None