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
Reaming action of the reamer is 
Select and explain. 
A. Pushing regenerating, B. Pushing, rotating & regenerating, C. Pushing & pulling, D. None
B: Pushing, rotating & regenerating
Answer: B: Pushing, rotating & regenerating 
Explanation: None