Technically, Yugoslavia did't exist between 1941-1945. It was not just occupied by Germany, it was tear apart by Hungary, Bulgaria, Italy... Maybe I will make quiz about that :))
And there is no such thing like collapse of Yugoslavia in 1948. It was in 1991.
I'm pretty sure Nestormakhno is referring to the Federal Republic of Yugoslavia (1992-2003, later renamed The State Union of Serbia & Montenegro). This 'smaller' Yugoslavia did border Croatia, Bosnia-Herzegovina and (North) Macedonia (it did not, however, border Slovenia).
The quiz instructions don't make clear that you're referring to the 'larger' pre-92 Yugoslavia
and 1948-collapse of yugoslavia
And there is no such thing like collapse of Yugoslavia in 1948. It was in 1991.
The quiz instructions don't make clear that you're referring to the 'larger' pre-92 Yugoslavia
Yugoslavia as a communist: We go Slavia