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
Ability of a bur blade to describe a complete circle during rotation is called as: 
Select and explain. 
A. Concentricity., B. Staticity., C. Run out., D. Symmetry
C: Run out.
Answer: C: Run out. 
Explanation: None