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
Spiral angle can be defined as: 
Select and explain. 
A. Angle between long axis and blade., B. Angle between long axis and cutting edge., C. Angle formed by the blades., D. All are same.
A: Angle between long axis and blade.
Answer: A: Angle between long axis and blade. 
Explanation: None