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
[{'content': 'In Zollinger Ellison syndrome what is raised- \nSelect and explain. \nA. Insulin, B. VIP, C. Gastrin, D. Glucagon', 'role': 'user'}, {'content': 'Answer: C \nExplanation: <p>Davidson&;s principles and practice of medicine 22nd edition. *Timor secreted gastrin which stimulated gastrin production to its maximum capacity.</p>', 'role': 'assistant'}]