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 true about A/E: \nSelect and explain. \nA. Surgery is to be done, B. Exocrine tumor, C. Endocrine disorder, D. Secretory diarrhea seen', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e. Exocrine tumor", 'role': 'assistant'}]