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': 'Zollinger-Ellison syndrome is characterized by all of the following except - \nSelect and explain. \nA. Post bulbar ulcer, B. Recurrent duodenal ulcer, C. Severe diarrhea, D. Massive HCL in response to histamine injection', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Important points that should raise the possibility of ZES in patients with duodenal ulcer.\n\n\nulcers in unusual locations i.e. postbulbar ulcers\nrecurrent or refractory ulcers\nulcers with diarrhoea\nmultiple ulcers\nulcers associated with prominent gastric folds\nulcers with findings s/o MEN-1 (endocrinopathy, family history of ulcer or endocrinopathy, nephrolithiasis)\nulcers without H. pylori infection', 'role': 'assistant'}]