This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Medicine
In Zollinger Ellison syndrome what is raised- 
Select and explain. 
A. Insulin, B. VIP, C. Gastrin, D. Glucagon
C: Gastrin
Answer: C: Gastrin 
Explanation: <p>Davidson&;s principles and practice of medicine 22nd edition. *Timor secreted gastrin which stimulated gastrin production to its maximum capacity.</p>