This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Benign Gastric Disease, Subject name: Surgery
[{'content': 'Most common location of peptic ulcer is - \nSelect and explain. \nA. 1st part of duodenum, B. Lesser curvature of stomac, C. Gastric antrum, D. At gastro-esophagal junction', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 1st part of duodenum Peptic ulcers are located in the following sites, in order of decreasing frequency (Robbins 7/e)1. Duodenum, 1st portion2. Stomach, usually antrum3. At the gastro - esophageal junction, in the setting of gastroesophageal reflux or Barrett's esophagus4. Within the margins of a gastrojejunostomy5. In the duodenum, stomach or jejunum of patients with Zollinger-Ellison Syndrome6. Within or adjacent to Meckels diverticulum that contains ectopic gastric mucosa", 'role': 'assistant'}]