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
All of the following antidiabetic drugs act by enhancing insulin resistance except 
Select and explain. 
A. Exenatide, B. Sitagliptan, C. Rosiglitazone, D. Repaglinide
C: Rosiglitazone
Answer: C: Rosiglitazone 
Explanation: 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