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': 'Not a complication of gallstones \nSelect and explain. \nA. Mucocele, B. Diveiculosis, C. Acute cholangitis, D. Empyema of the gallbladder', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Effects and complications of Gallstones In Gallbladder In Bile duct In intestine Silent stones Acute cholecystitis Chronic cholecystitis Mucocele Empyema Perforation Gangrene Carcinom Obstructive jaundice Cholangitis Acute pancreatitis Gall stone ileus Ref: Sabiston 20th edition Pgno : 1492-1493', 'role': 'assistant'}]