Consider the following statements: 1. Montenegro and Serbia agreed to a new structure for the Yugoslav Federation. 2. Croatia remained under the Hungarian Administration until the end of First World War. 3. Claims to Macedonia Territory have long been a source of contention between Belgium and Greece. 4. In 1991, Slovenia declared independence from Czechoslovakia. Which of the statements given above are correct?

Evaluating statements about European political situations: 1. Statement 1: In February 2003, Montenegro and Serbia agreed to form a loose state union called Serbia and Montenegro, replacing the Federal Republic of Yugoslavia. This established a new structure for the Yugoslav Federation (or its successor state). So, statement 1 is correct. 2. Statement 2: Croatia was historically linked with Hungary, particularly as part of the Lands of the Crown of Saint Stephen within Austria-Hungary. It remained under Austro-Hungarian administration until the end of First World War (1918), after which it became part of the Kingdom of Serbs, Croats and Slovenes (later Yugoslavia). So, statement 2 is correct. 3. Statement 3: Historical claims to the territory of Macedonia have been a source of contention primarily between Bulgaria, Greece, and Serbia (and later North Macedonia), not involving Belgium. So, statement 3 is incorrect. 4. Statement 4: Slovenia declared independence in 1991 from the Socialist Federal Republic of Yugoslavia, not from Czechoslovakia (which peacefully dissolved into the Czech Republic and Slovakia in 1993). So, statement 4 is incorrect. Therefore, statements 1 and 2 are correct.