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
Apexum device is 
Select and explain. 
A. NiTi device for periapical debridement through root canals., B. NiTi device to locate the apex of the root canal., C. Stainless device for periapical debridement through root canals, D. Fiberoptic device to locate the apex of the root canal.
A: NiTi device for periapical debridement through root canals.
Answer: A: NiTi device for periapical debridement through root canals. 
Explanation: None