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
The file which has a non-cutting side is 
Select and explain. 
A. K-files, B. Safety K-files, C. Hedstrom files, D. Safety Hedstrom files
D: Safety Hedstrom files
Answer: D: Safety Hedstrom files 
Explanation: None