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 three types of abrasives used in dentistry can be classified as the following EXCEPT: 
Select and explain. 
A. Polishing abrasives, B. Finishing abrasives, C. Bleaching abrasives, D. Cleansing abrasives
C: Bleaching abrasives
Answer: C: Bleaching abrasives 
Explanation: None