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
Drug of choice in Zollinger Ellison syndrome is - 
Select and explain. 
A. Ranitidine, B. Omeprazole, C. Antacids, D. β-blocker
B: Omeprazole
Answer: B: Omeprazole 
Explanation: None