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 first instrument to extirpate pulp is 
Select and explain. 
A. Barbed broach, B. K-type file, C. Reamer, D. H-type file
B: K-type file
Answer: B: K-type file 
Explanation: None