(A) the Group of Eight
(B) ** the United Nations
(C) the North Atlantic Treaty Organization
(D) the Warsaw Pact
EXPLANATIONS BELOW
Concept note-1: -It was signed on 26 June 1945, in San Francisco, at the conclusion of the United Nations Conference on International Organization, and came into force on 24 October 1945.
Concept note-2: -Four months after the San Francisco Conference ended, the United Nations officially began, on 24 October 1945, when it came into existence after its Charter had been ratified by China, France, the Soviet Union, the United Kingdom, the United States and by a majority of other signatories.
Concept note-3: -Predecessor: The League of Nations | United Nations.
Concept note-4: -On April 19, 1946, the League of Nations dissolved, ending 26 years of the existence of an organization which had proven incapable of preventing World War II.