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
Which one is not Ranson's prognostic criteria in acute pancreatitis - 
Select and explain. 
A. Age over 55 years, B. Blood glucose more than 200 mgs %, C. WBC more than 16000/mm3, D. Serum calcium more than 8 mg %
D: Serum calcium more than 8 mg %
Answer: D: Serum calcium more than 8 mg % 
Explanation: None