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
Effect of GLP-1 ? 
Select and explain. 
A. Increased aldosterone secretion by adrenal, B. Increased PTH secretion, C. Increased insulin secretion from beta-cells of pancreas, D. Increased testosterone secretion from Leydig cells
C: Increased insulin secretion from beta-cells of pancreas
Answer: C: Increased insulin secretion from beta-cells of pancreas 
Explanation: Ans. is 'c' i.e., Increased insulin secretion from beta-cells of pancreas