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: Medicine
[{'content': 'Recovery of renal functions after renal transplant usually takes - \nSelect and explain. \nA. 15 days, B. 1 month, C. 6 months, D. 7 days', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]