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
Sequence of endodontic instrumentation 
Select and explain. 
A. Broach-reamer-file, B. Reamer-Broach-file, C. File-Reamer-Broach, D. File-broach-reamer
C: File-Reamer-Broach
Answer: C: File-Reamer-Broach 
Explanation: None