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': 'Eruption date of deciduous maxillary 2nd molar is: \nSelect and explain. \nA. 20 months, B. 18 months, C. 24 months, D. 28 months', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]