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 safest instrument for removing the pulp from the very fine canal is: 
Select and explain. 
A. Barbed broach, B. Small K type file, C. Tempered universal Headstroem file, D. Smooth broach
B: Small K type file
Answer: B: Small K type file 
Explanation: None