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': "Ranson's aitaria for prognosis in acute pancreatitis include all except - \nSelect and explain. \nA. WBC > 16,000 cells/cumin, B. Age over 55 years, C. AST > 250 U/100 ml, D. S.amylase > 350 I.U.", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]