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': 'Most common viral infection in kidney - \nSelect and explain. \nA. EBV, B. HSV, C. CMV, D. HBV', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]