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: Surgery
[{'content': "Which one is not Ranson's prognostic criteria in acute pancreatitis - \nSelect and explain. \nA. Age over 55 years, B. Blood glucose more than 200 mgs %, C. WBC more than 16000/mm3, D. Serum calcium more than 8 mg %", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]