This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Stomach & Duodenum, Subject name: Surgery
Duodenal blow out following Billroth gastrectomy most commonly occurs on which day: 
Select and explain. 
A. 2nd day, B. 4th day, C. 6th day, D. 12th day
B: 4th day
Answer: B: 4th day 
Explanation: Ans. (b)4th dayRef: Shackelford 7th Edition, Page 930, 944* Most common on 4th to 7th postoperative day.* No need to do surgery immediately. Only USG-guided drainage is enough. Most of them settle by maximum 1 month.