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
With which of the following instrument stability is highest during scaling and root planning? 
Select and explain. 
A. Files, B. HOE scaler, C. Chisel, D. Sickle scaler
B: HOE scaler
Answer: B: HOE scaler 
Explanation: None