This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gallbladder, Subject name: Surgery
Cholangiography T-tube done after how many days of cholecystectomy: 
Select and explain. 
A. 1-5 days, B. 7-10 days, C. 10-14 days, D. 15-20 days
B: 7-10 days
Answer: B: 7-10 days 
Explanation: Cholangiography T-tube done after 7-10 days of cholecystectomy.