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': 'Cholangiography T-tube done after how many days of cholecystectomy \nSelect and explain. \nA. 1-5 days, B. 5-9 days, C. 10-14 days, D. 15-20 days', 'role': 'user'}, {'content': "Answer: B \nExplanation: Cholecystectomy with choledochotomy and CBD exploration T-tube is left in place for cholangiography and removal of any retained stone T-tube cholangiogram is done on 7th - 10th day Post-operatively Remove T-tube if cholangiogram is normal If residual stone is discovered on the postoperative cholangiogram, T-tube should be left in place for 4-6 weeks for the tract to mature The stones are removed percutaneously through the matured tract by Burhenne's technique Ref: Sabiston 20th edition Pgno : 1511", 'role': 'assistant'}]