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
[{'content': 'Best ﬁnish line for posterior metal ceramic crown is: \nSelect and explain. \nA. Chamfer with bevel, B. Heavy chamfer, C. Shoulder, D. Shoulder with bevel', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Key Concept:', 'role': 'assistant'}]