The correct option is D All the above
The four main objectives of the UNO are as follows:
(1) To establish international peace and security.
(2) To solve the crisis among the nations by way of justice and international law, avoiding the wars.
(3) To create healthy atmosphere for world peace by avoiding discrimination of strongest and weakest nations and increasing friendly relations, cooperation and coordination.
(4) To bring all the nations together and solve the economical, social and cultural problems by cooperating among them.