This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Pharmacology
Exenatide is a new drug used in diabetes mellitus. Mechanism of action of this drug is:- 
Select and explain. 
A. Inhibition of DPP- 4, B. Release of insulin acting as agonist of GLP-1 receptors, C. Inhibiting intestinal absorption of carbohydrates, D. Stimulation of PPAR-gamma
B: Release of insulin acting as agonist of GLP-1 receptors
Answer: B: Release of insulin acting as agonist of GLP-1 receptors 
Explanation: (a) Exogenous GLP-1 agonist --> Exenatide, Liraglutide --> given SC Analogues. (b) DPP-4 Inhibitors --> Sitagliptin, Vildagliptin --> given orally. (c) Inhibition of Intestinal absorption of carbohydrate --> Acarbose. (d) Stimulation of PPAR - gamma --> Piaglitazone, Rosiglitazone