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 preferred gingival finish line for veneer metal restoration is 
Select and explain. 
A. Shoulder, B. Chamfer, C. Shoulder with bevel, D. Radial shoulder
B: Chamfer
Answer: B: Chamfer 
Explanation: None