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': 'To replace a missing canine, the best pontic design is: \nSelect and explain. \nA. Modified ridge lap, B. Ridge lap, C. Ovoid, D. Sanitary', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]