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': 'Egg-shaped pontic is indicated for the replacement of \nSelect and explain. \nA. Mandibular posteriors, B. Mandibular anteriors, C. Maxillary posteriors, D. Maxillary anteriors', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]