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': '1st evidence of calcification of Maxillary Lateral incisor occurs \nSelect and explain. \nA. 10-12 months, B. 16-17 months, C. 17-19 monhts, D. 15 months', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]