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': "Ante's law provides an aid for \nSelect and explain. \nA. Selection of pontic, B. Selection of connector, C. Selection of retainers, D. Selection of abutments", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]