Q. Which of the following is the full form of U.S.S.R?
Answer: Union of Soviet Socialist Republics
Notes: The full form of USSR is the Union of Soviet Socialist Republics. It comprises of a confederation of Russia, Belorussia, Ukraine, and the Transcaucasian Federation (which was divided in 1936 into the Georgian, Azerbaijan, and Armenian republics). It was also known as the Soviet Union. It was the successor to the Russian Empire and the first country in the world to be based on Marxist socialism.