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': 'The pontic design of choice in the appearance zone of\nmaxillary and mandibular bridge \nSelect and explain. \nA. Hygienic, B. Modified ridge lap, C. Saddle, D. Conical', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]