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': 'Which is the first non-succedaneous tooth to erupt into the oral cavity: \nSelect and explain. \nA. Mandibular central incisor., B. Mandibular first molar., C. Maxillary first molar., D. Maxillary central incisor.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Mandibular central incisor is the first succedaneous tooth to erupt in the oral cavity.\nMandibular 1st molar is the first non-succedaneous tooth to erupt in the oral cavity.', 'role': 'assistant'}]