Which of the following international organizations was in existence before the outbreak of the second world war?

The League of Nations was in existence before the outbreak of the Second World War. The League of Nations was an intergovernmental organization founded in 1920 as a result of the Paris Peace Conference that ended the First World War. Its main goal was to maintain international peace and security through collective security and disarmament and promoting economic and social cooperation among its member states. However, its effectiveness was limited, and it failed to prevent the outbreak of the Second World War. The League of Nations was dissolved in 1946 and replaced by the United Nations.