The correct option is A Yugoslavia
After Tito’s death in 1980, bitter inter-ethnic rivalries asserted themselves and there were clashes between different ethnic groups, such as the Kosovan Albanians and Serbs. There was a rise in Serbian para-militarism and heightened tension between the Muslim Bosnians, the Croats and the Serbs in Bosnia-Herzegovina. By 1990, the Serbian-controlled Federal government refused to agree to Croatia and Slovenia’s demands for a multiparty government. Hence, Option A is correct. The rest of the countries do not have Serbian and Albanian ethnic groups, hence, incorrect.