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
Limit of eccentricity of air rotor bur is 
Select and explain. 
A. 0.01 mm, B. 0.04 mm, C. 0.02 mm, D. 0.03 mm
C: 0.02 mm
Answer: C: 0.02 mm 
Explanation: None