<prompt> Which of the following is not a cause of acute pancreatitis ?HypercalcemiaThrombotic thrombocytopenic purpuraCystic fibrosisMagnetic resonance cholangiopancreatography MRCP  <response>: Ans. is d i.e., Magnetic resonance cholangiopancreatography MRCP Causes of Acute Pancreatitis Common causes Gallstones including microlithiasis - most common Hyperiglyceridemia Endoscopic retrograde cholangiopancreatography ERCP, especially after biliary manometry. Trauma especially blunt abdominal trauma Postooperative abdominal and nonabdominal operation Drugs L-asparginase, thiazide diuretics, frusomide, estrogens, azathioprime, 6-mercaptopurine, methyldopa, sulfonamide, tetracyclin, valproic acid, anti-HIV medicacations Sphincter of Oddi dysfunction Uncommon causes Vascular causes and vasculitis ischemic-hypoperfusion states after cardiac surgery Connective tissue disorders and thrombotic thrombocytopenic purpura TTP Cancer of the pancreas Hypercalcemia Periampullary diveiculum Pancreas divisum Hereditary pancreatitis Cystic fibrosis Renal failure 