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
Bariatric surgery operations include all except 
Select and explain. 
A. Gastric banding, B. Gastric by pass, C. Biliopancreatic diversion, D. Ileal transposition
D: Ileal transposition
Answer: D: Ileal transposition 
Explanation: Ans. (d) Ileal transpositionRef: Sabiston 19th Edition, Page 363Malabsorptive* Jejunoileal and jejunocolic bypasses (no longer recommended)Restrictive* Vertical banded gastroplasty* Adjustable silicone gastric banding* Sleeve gastrectomyMostly restrictive (and partly malabsorptive)* Short-limb (50-100cm) Roux-En-Y gastric bypass* Long-limb (150cm) Roux-En-Y gastric bypassMostly malabsorptive* Biliopancreatic diversion with or without duodenal switch