The correct answer is: A: The first republic to secede from county of Yugoslavia in 1990s was Slovenia. In 25 June of 1991, Slovenia declared independence, and it was internationally recognized as an independent state in 1992 by many European countries. Slovenia and Macedonia separated with out conflicts, but separation of Croatia and Bosnia and Herzegovina resulted in civil war on their territories. Today, there is six sovereign states, which were part of Yugoslavia after the WW II: Serbia, Slovenia, Croatia, Bosnia and Herzegovina, Montenegro and Macedonia.