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': 'All of the following antidiabetic drugs act by enhancing insulin resistance except \nSelect and explain. \nA. Exenatide, B. Sitagliptan, C. Rosiglitazone, D. Repaglinide', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Refer KDT 7th /270 Rosiglitaxzone does not act by increasing insulin secretion Rosiglitazone is an oral antihyperglycemic agent that acts primarily by decreasing insulin resistance', 'role': 'assistant'}]