Very good quiz. At first I thought that each country was the most populous to use that currency, but that would be Germany for the euro. It looks like that's the only exception.
Thank you, I didn't notice that trend myself, I simply tried to include a mix of easier and more difficult answers, and choosing countries like the United States for the Dollar and India for the Rupee were my go-to's.
Seeing as the Euro is only guessed right 81% of the time, I bet people have made that mistake (among others). The Franc was France's currency a short 20 years ago.