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 concerns the \nSelect and explain. \nA. Degree of tipping allowable in the abutment tooth, B. Amount of increase in retentive factor with a full crown versus a 3/4th crown, C. Crown : Root ratio, D. Ratio of combined pericemental root surface area of the abutment teeth and the pericemental root surface areas of the teeth to be replaced", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]