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
Which of the following is not a component of Apexum Device 
Select and explain. 
A. NiTi Hollow tube, B. Precarved NiTi coarse ablator, C. Precarved NiTi Smooth ablator, D. Precarved NiTi Fine ablators
C: Precarved NiTi Smooth ablator
Answer: C: Precarved NiTi Smooth ablator 
Explanation: None