সঠিক উত্তর হচ্ছে: ২০০২
ব্যাখ্যা: The euro is the official currency for 19 of the 28 EU member countries. A long preparatory path of over 40 years led to the introduction of the euro in 2002. The European Central Bank and the European Commission are in charge of maintaining its value and stability, and for establishing the criteria required for EU countries to enter the euro area. সূত্রঃ EU website.