<prompt> The sulphonylurea with relative longer duration of action is:ChlorpropamideTolbutamideGlibenclamideGlipizide  <response>: The duration of action of various sulfonylureas is given below:Tolbutamide: 6-8 hoursGlipizide: 10-16 hoursGlibenclamide: 16-24 hoursChlorpropamide: 30-36 hours 