<prompt> Most Commonly done screening test for diagnosing Acute PancreatitisSerum amylaseSerum lipaseSerum trypsinNBT PABA  <response>: 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. 