Great idea for a quiz but there are quite a few typos (Aarhus wasn't accepted as an answer because here it's spelt "Arhus") and it's Iasi, not Lasi - but even given correctly that's a suspect answer. You don't give sources for the information in this quiz, but Cluj-Napoca is the second city in Romania as far as I can tell from online information. Would be a fantastic quiz if you can sort out the small slips.