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': 'T/t of CBD stone includes \nSelect and explain. \nA. Endoscopic papillotomy, B. ERCP, C. Ursodeoxy xholic acid, D. Hepatojejunostomy', 'role': 'user'}, {'content': "Answer: A \nExplanation: ERCP-therapeutic,i.e.,Endoscopic papillotomy (sphincterotomy) and stone extraction through Dormia basket or balloon catheter is the treatment of choice for CBD stones.It has a success rate of around 95%.Other methods include mechanical/extracorporeal shock (ESW)lithotripsy and extraction;or removal through baby endoscope.CBD stent is placed insitu.Once stones are removed,laparoscopic cholecystectomy can be done. Reference:SRB's manual of surgery,5th edition,page no:651.", 'role': 'assistant'}]