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 anterior teeth 'rests' are ideally prepared and located\non \nSelect and explain. \nA. Incisal edges, B. Lingual surfaces, C. Mesial surfaces, D. Distal surfaces", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]