Correct Answer: (c) Austria
Solution:Vienna is the capital of Austria. The headquarter of International Atomic Energy Agency (LA.E.A.) is in Vienna, Austria. Vienna is also one of the nine federal states (Bundesländer) that make up Austria. Vienna is the most populous city in Austria, with a large metropolitan area population. Vienna is situated in the northeast of Austria, along the Danube River. Vienna is the cultural, economic, and political center of Austria.