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': 'All are variables most consistently predicts 6 week moality , EXCEPT: \nSelect and explain. \nA. Child-Pugh class C, B. MELD score > 18, C. Early rebleeding, D. Age > 50', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The variables most consistently found to predict 6-week moality are: Child-Pugh class C MELD score > 18 Failure to control bleeding or early re-bleeding Ref:Journal of Hepatology 2010', 'role': 'assistant'}]