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
Kidney complication of renal transplant A/E - 
Select and explain. 
A. Viral infection, B. Graft Vs host reaction, C. Malignancy, D. Dementia
D: Dementia
Answer: D: Dementia 
Explanation: None