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': 'Among the following first teeth to erupt in the oral cavity is: \nSelect and explain. \nA. Maxillary central incisor, B. Mandibular central incisor., C. Maxillary lateral incisor., D. Mandibular lateral incisor.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Eruption timing for\nMandibular central incisor: 6 yrs.\nMandibular lateral incisor and maxillary central incisor: 7-8 yrs.\nMaxillary lateral incisor: 8-9 yrs.', 'role': 'assistant'}]