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