সঠিক উত্তর হচ্ছে: ১৯
ব্যাখ্যা: The eurozone/Euro area, is a monetary union of 19 of the 27 European Union (EU) member states which have adopted the euro (€) as their common currency and sole legal tender. The other eight members of the EU continue to use their own national currencies. The eurozone consists of Austria, Belgium, Cyprus, Estonia, Finland, France, Germany, Greece, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Portugal, Slovakia, Slovenia, and Spain.