This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hepatic encephalopathy & hepatic failure, Subject name: Medicine
[{'content': 'Milan criteria is used for: \nSelect and explain. \nA. Liver transplantation, B. GERD staging, C. Cirrhosis staging, D. Hepatic encephalopathy staging', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Milan criteria are applied as a basis for selecting patients with cirrhosis and hepatocellular carcinoma for liver transplantation. The Milan criteria state that a patient is selected for transplantation when he or she has: One lesion smaller than 5 cm. Up to 3 lesions smaller than 3 cm. No extrahepatic manifestations No vascular invasion', 'role': 'assistant'}]