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 gingival finish Line on a tipped molar should be 
Select and explain. 
A. Shoulder, B. Chamfer, C. Knife edge, D. Feather edge
C: Knife edge
Answer: C: Knife edge 
Explanation: None