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 Chamfer finish line is used in 
Select and explain. 
A. Lingual surface of metal ceramic crown, B. Facial surface of metal ceramic crown, C. Facial surface of porcelain jacket crown, D. Lingual surface of porcelain jacket crown
A: Lingual surface of metal ceramic crown
Answer: A: Lingual surface of metal ceramic crown 
Explanation: None