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: Physiology
After a meal rich in carbohydrate, insulin secretion is stimulated by 
Select and explain. 
A. CCK, B. Serotonin, C. VIP, D. GLP-1 (7-36) amide
D: GLP-1 (7-36) amide
Answer: D: GLP-1 (7-36) amide 
Explanation: D i.e. GLP-1 (7-36) amide