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': 'Kidney complication of renal transplant A/E - \nSelect and explain. \nA. Viral infection, B. Graft Vs host reaction, C. Malignancy, D. Dementia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]