<prompt> Most common complication of acute pancreatitis is:Pancreatic abscessPseudocystPhlegmonPleural effusion  <response>: Ans. is b Pseudocyst Ref Schwartz Handbook, 7e, p. 704, Harrison 17e p 2011.Pseudocyst is the most common complication usually occurring after 2-3 weeks - Schwartz Handbook, 7e, p. 704. 