This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'Veical banding gastroplasty, also known as stomach stapling is done for? \nSelect and explain. \nA. Gastric carcinoma, B. Achalsia cardia, C. Perforated gastric ulcer, D. Morbid obesity', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Morbid obesity REF: Sabiston Textbook of Surgery, 18th ed. Chapter 17 Bariatric operations produce weight loss as a result of two factors. One is restriction of oral intake. The other is malabsorption of ingested food. Bariatric Operations: Mechanism of Action: Restrictive Veical banded gastroplasty (VBG) (historic purposes only) Laparoscopic adjustable gastric banding (LAGB) Largely Restrictive/Mildly Malabsorptive Roux-en-Y gastric bypass (RYGB) Largely Malabsorptive/Mildly Restrictive Biliopancreatic diversion (BPD) Duodenal switch (DS)', 'role': 'assistant'}]