This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pancreas, Subject name: Surgery
[{'content': 'Most Commonly done screening test for diagnosing Acute Pancreatitis \nSelect and explain. \nA. Serum amylase, B. Serum lipase, C. Serum trypsin, D. NBT PABA', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Serum AmylaseRef: Bailey and Love 27th ed. pg. 1214* Most common used to diagnose Acute pancreatitis - Serum amylase (will be elevated for first 3 days and declines in 4-8 days)* Serum Lipase though more sensitive is not widely available.', 'role': 'assistant'}]