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': 'True about gallstone disease \nSelect and explain. \nA. Acute cholecystitis presents with GB Perforation, B. Acute cholecystitis presents with mucosal ulceration of GB, C. 80% cases of cholithiasis are symptomatic, D. Mucocele of GB contains infected bile', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Acute cholecystitis is related to gallstones in 90-95% of cases In most severe cases, this process can lead to ischemia and necrosis of GB wall(5-10%) Perforation is not usually seen Ref: Sabiston 20th edition Pgno :1492-1493', 'role': 'assistant'}]