<prompt> Drug of choice in Zollinger Ellison syndrome is :RanitidineOmeprazoleAntacidsB-blocker  <response>: Ans. is b Omeprazole Ref. Harrison, 17e, p 1869 16e, p 1759 15e, p 1662. Treatment of choice for Zollinger Ellison syndrome is - Proton pump inhibitors Omeprazole or lansoprazole. 