This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cirrhosis, Subject name: Medicine
Which of the following is an absolute contraindication to liver transplantation? 
Select and explain. 
A. Age >70, B. Poal vein thrombosis, C. Severe obesity, D. AIDS
D: AIDS
Answer: D: AIDS 
Explanation: Absolute contraindications Relative contraindications Uncontrolled hepatobiliary infection Age >70 Sepsis Poal vein thrombosis AIDS Severe obesity Cholangiocarcinoma HIV sero-positivity with low CD4 counts Metastasis to liver PAH Advanced cardiopulmonary disease Psychiatric disorders Active substance/ alcohol abuse Congenital anomaly (Uncorrectable)