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
What is the limit of eccentricity of an air rotor bur, beyond which it stops working 
Select and explain. 
A. 0.01, B. 0.02, C. 0.03, D. 0.04
B: 0.02
Answer: B: 0.02 
Explanation: None