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: Medicine
[{'content': 'All are true regarding Zollinger Ellison syndrome, except- \nSelect and explain. \nA. Diarrhoea, B. Recurrence after operation, C. Hypergastrinemia, D. Decreased ratio of BAO to MAO', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]