This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
[{'content': 'The commonest cause of acute pancreatitis \nSelect and explain. \nA. Biliary calculi, B. Alcohol abuse, C. Infective, D. Idiopathic', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Causes of Acute pancreatitis Common causes Gallstones including microlithiasis (most common) Alcohol (2nd most common) Hyperglyceridemia ERCP Blunt abdominal trauma Post operative Drugs Sphincter of oddi dysfunction Rare causes Infections (CMV, Coxsackie, Mumps, Echovirus (CME) parasites) Autoimmune (sjogren syndrome) Uncommon causes Vascular causes and Vasculitis (ischaemic hypoperfusion states after Cardiac surgery) Connective tissue disorders TTP CA pancreas Hypercalcemia(Hyperparathyroidism) Periampullary Diveiculum Pancreas divisum Hereditary pancreatitis Cystic fibrosis Renal failure Ref: Sabiston 20th edition Pgno :1525-1526th edition', 'role': 'assistant'}]