This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gall Bladder & Bile Ducts, Subject name: Surgery
Incidence of Gallstone is high in: 
Select and explain. 
A. Partial hepatectomy, B. Ileal resection, C. Jejuna resection, D. Subtotal gastrectomy
B: Ileal resection
Answer: B: Ileal resection 
Explanation: Ans. (b) Ileal resection* Ileum is the principal Site for Entero hepatic Circulation- It resected it can lead to decreased Bile salt pool and hence gall stone