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: Surgery
[{'content': 'Treatment of symptomatic retained GB stone is? \nSelect and explain. \nA. Sphincterotomy, B. ESWL, C. Laproscopic removal, D. None of these', 'role': 'user'}, {'content': 'Answer: A \nExplanation: .Gall stones should be dealt by laparoscopic cholecystectomy in 2 weeks after acute attack. Endoscopic sphincterotomy (ERCP) and often stenting may be needed if there are CBD stones. ERCP--Therapeutic, i.e. Endoscopic papillotomy (sphincterotomy) and stone extraction through Dormia basket or balloon catheter; or fragmenting the stone and extraction; or removal through baby endoscope. CBD stent is placed in situ.Once CBD stones are extracted through ERCP, laparoscopic cholecystectomy is done. ref : SRB&;s manual of surgery,3 rd ed,pg no 584', 'role': 'assistant'}]