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': 'In the majority of situations, the first deciduous tooth to erupt is the: \nSelect and explain. \nA. Mandibular central incisor, B. Mandibular first molar, C. Maxillary central incisor, D. Maxillary second molar', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]