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
Ideal angle the sharpening stone must form with the face of the blade is 
Select and explain. 
A. 70 - 80 degrees, B. 90 - 100 degrees, C. 100 - 110 degrees, D. 120 - 130 degrees
C: 100 - 110 degrees
Answer: C: 100 - 110 degrees 
Explanation: None