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: Forensic Medicine
[{'content': 'Second molar erupts at : \nSelect and explain. \nA. 6 years, B. 12 years, C. 18 to 22 years, D. 25 to 28 years', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. 12 years', 'role': 'assistant'}]