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
In dental burs, the angle formed between the back of the blade and the tooth surface is called as 
Select and explain. 
A. Clearance angle, B. Rake angle, C. Cavosurface angle, D. Point angle
A: Clearance angle
Answer: A: Clearance angle 
Explanation: None