This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Surgical Treatment Obesity, Subject name: Surgery
[{'content': 'Vertical 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: ANSWER: (D) Morbid obesityREF: Sabiston Textbook of Surgery, 18th ed. Chapter 17Bariatric operations produce weight loss as a result of twTo factors. One is restriction of oral intake. The other is malabsorption of ingested food.Bariatric Operations: Mechanism of Action:RestrictiveVertical 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'}]