The correct option is D W: Serbia, X: Yugoslavia,
Y: Czechoslovakia, Z: Poland
Post-war Europe saw the emergence of several new independent states, and a major re-drawing of territorial boundaries. For one, the former empire of Austria-Hungary was dissolved, and new nations were created from its land: Austria, Hungary, Czechoslovakia, and Yugoslavia. The latter was formed after the merger of the State of Slovenes, Croats and Serbs with the Kingdom of Serbia. Poland was reconstituted, and Finland, Estonia, Latvia, and Lithuania were recognised as independent nations.