What do you mean by UNO? Where does its headquarter lie?
UNO is an international organization that wasestablished with the unity of different nations forthemaintenanceof peace and security.
Its headquarter lies in New York.
What is meant by veto? Which country can use it?
Veto is the special right to reject any decision made by the general assembly of UNO.
It can be used by 5 permanent members of UNO.
They are. USA, Britain, France, Russia and china.