A. Tuvalu

B. Kiribati

C. Burundi

D. Nauru

Details of Least known country in the world:

Of the 195 countries, the typical American can only name 85, according to surveys, meaning that many are more unknown to the US and the rest of the globe. One of these is Nauru, which only gained independence from the UN in 1968 and has a population of 12,500, with only 180 tourists there in the previous year. The reason is because it is a tiny island nation with few valuable resources that is located close to the equator and remote from other nations.