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 process of achieving limited removal of epithelial tissue in the sulcus while creating chamfer finish margin is called: 
Select and explain. 
A. Rotary curettage, B. Mechanico surgical gingival retraction, C. Electro surgery, D. Periodontal curettage
A: Rotary curettage
Answer: A: Rotary curettage 
Explanation: None