Which is the world's busiest airport by passenger traffic?

Which country is the world's largest producer of crude oil?

Which city is known as the City of Gold?

What is the currency of Italy and most eurozone countries?

Which international organisation works to promote global health and combat diseases?

What is the capital city of Italy?

Which UN agency focuses specifically on the welfare and rights of children worldwide?

Which country has the most Nobel Prize winners in total?

Which UN agency promotes international educational scientific and cultural cooperation?

Which is the largest lake in the world by surface area?

Which international peace prize is awarded annually in Oslo Norway?