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': "As per MCI, minimum period for which a doctor should preserve his patient's record: JIPMER 13 \nSelect and explain. \nA. 2 years, B. 3 years, C. 4 years, D. 5 years", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. 3 years', 'role': 'assistant'}]