This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pancreas, Subject name: Surgery
[{'content': 'All are true about Zollinger-Ellison syndrome except: \nSelect and explain. \nA. Recurrent ulceration after acid reducing surgery, B. Raised gastrin levels in all cases, C. Decreased BAO/MAO, D. Diarrhea', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) Decreased BAO/MAOBlood levels of ZES:* 100% all patients will have Se. gastrin >100pg/ml* BAO >15meq/hr in most patients* BAO will be 60% of MAO (BAO - Basal Acid output, MAO - Maximal Acid Output)* Levels of Se. Gastrin >1000pg/ml is diagnostic* If there is only borderline elevation provocative tests with secretin, Calcium etc are done* With Secretin stimulation gastrin increases >200pg/ml in 15 minutes is diagnostic', 'role': 'assistant'}]