Which country was NOT part of a larger country during the Cold War?

During the Cold War, Hungary maintained its status as a separate nation-state and was not part of a larger country. It was one of the Warsaw Pact countries, which was a military alliance of Eastern Bloc socialist republics led by the Soviet Union. While it was under strong Soviet influence, Hungary operated as an independent entity within the communist bloc.

In contrast, the other options listed were part of larger political entities during the Cold War. Belarus, for example, was a part of the Soviet Union, while Slovakia was one half of Czechoslovakia, which was also a single nation during that period. Lithuania, similarly, was one of the Baltic states that were incorporated into the Soviet Union. Thus, Hungary stands out as the country that remained distinctly independent in terms of its national status throughout the duration of the Cold War.