This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Robotics, Laparoscopy and Bariatric Surgery, Subject name: Surgery
All are components of duodenal switch surgery EXCEPT: 
Select and explain. 
A. Gastro-duodenostomy, B. Cholecystectomy, C. Duodeno-ileostomy, D. Sleeve gastrectomy
A: Gastro-duodenostomy
Answer: A: Gastro-duodenostomy 
Explanation: Gastro-duodenostomy is not a component of duodenal switch surgery Components of duodenal switch surgery are: Sleeve gastrectomy Duodeno-ileostomy Jejuno-ileostomy Cholecystectomy Appendectomy