Answer : 3. "हँगरी "
Explanation :

A landlocked country is a country that is not connected to an ocean or sea or does not have a coastline. Hungary is bordered by Slovakia, Ukraine, Romania, Serbia, Croatia, Slovenia and Austria. Its capital is Budapest and is a member of the European Union. Belgium is bordered by Netherlands, Germany, Luxemburg, France and the North Sea. Romania is bordered by Bulgaria, Ukraine, Hungary, Serbia, Moldova and the Black Sea. Ukraine is bordered by Russia, Belarus, Poland, Slovakia, Hungary, Romania, Moldova and the Black Sea.