A patient suffering from non-insulin-dependent diabetes mellitus was prescribed glibenclamid internally. What is the mechanism of its hypoglycemic action?

Answer options

1. It intensifies utilization of glucose by peripheral tissues
2. It inhibits gluconeogenesis in liver
3. It stimulates generation of endogenous insulin by beta cells
4. It inhibits alpha glucosidase and polysaccharide breakdown
5. It inhibits glucose absorption in the bowels