Chlorpropamide is the correct answer because it is the only medication listed that belongs to the sulfonylurea class of drugs used to treat type 2 diabetes. Diabinese, repaglinide, nateglinide, starliz, and precose are all different medications used to treat diabetes, but they belong to different drug classes such as meglitinides, alpha-glucosidase inhibitors, and DPP-4 inhibitors. Therefore, chlorpropamide is the only medication that is a sulfonylurea and is the correct answer.