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': 'Once the enamel formation is complete, the tooth will erupt after approximately: \nSelect and explain. \nA. One year, B. Two years, C. Three years, D. Four years', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]