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
All are true regarding Zollinger Ellison syndrome, except- 
Select and explain. 
A. Diarrhoea, B. Recurrence after operation, C. Hypergastrinemia, D. Decreased ratio of BAO to MAO
D: Decreased ratio of BAO to MAO
Answer: D: Decreased ratio of BAO to MAO 
Explanation: None