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': 'In a class II mesio occlusal inlay gingival bevel is at \nSelect and explain. \nA. 30-40, B. 45-60, C. 60-80, D. no fixed angulation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]