This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gallstone Disease, Subject name: Surgery
[{'content': 'All are complications of gall stones except: \nSelect and explain. \nA. Diverticulosis, B. Acute cholangitis, C. Mucocele, D. Empyema of Gallbladder', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans: A (Diverticulosis) Ref: Bailey and Love's Short Practice of Surgery 25th Edition & Schwartz's Principles of Surgery, 9th EditionExplanation:Complications of Gall StonesAcute and Chronic cholecystitisJaundiceMucocele of GBEmpyema of GBGangrene of GBSepsisCa Gall BladderCholangitisPancreatitisiMirrizi syndrome: Biliary duct obstruction secondary to stone impaction in hartman's pouch of GBGallstone ileus", 'role': 'assistant'}]