This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pharmacology
[{'content': 'Which of the following is a GLP-1 agonist? \nSelect and explain. \nA. Pramlintide, B. Exenatide, C. Sitagliptin, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Alpha-Glucosidase inhibitors |Glucose absorption Acarbose, Miglitol Dipeptidyl peptidase IV inhibitors Prolong endogenous GLP-1 action Sitagliptin GLP-1 agonist |Insulin, |Glucagon, slow gastric emptying Exenatide Amylin agonist Slow gastric emptying, |Glucagon Pramlintide Ref: KD TRIPATHI 8TH ED.', 'role': 'assistant'}]