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': 'Ridge lap design of ponticis indicated for the replacement\nof a \nSelect and explain. \nA. Maxillary first molar, B. Maxillary central incisor, C. Mandibular first molar, D. Mandibular second premolar', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]