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': 'Main disadvantage of chamfer finish line is \nSelect and explain. \nA. It is less conservative, B. May create lipping, C. Does not provide distinct margin, D. All of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]