This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Medicine
[{'content': 'Treatment of choice for Zollinger Ellison syndrome (ZES)is- \nSelect and explain. \nA. PPI, B. Somatostatin analogues, C. Streptozocin, D. Sucralfate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: <p>Davidson&;s principles and practice of medicine 22nd edition. *In majority of the patients continued therapy with omeprazole or other PPI can be successful in healing ulcers and diarrhoea. </p>', 'role': 'assistant'}]