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': 'Reverse bevel is given for \nSelect and explain. \nA. Convenience form, B. Resistance from, C. Lap sliding fit, D. To remove the undermined enamel', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]