Which country is called land of Blue sky?

Which country is called land of Blue sky?A. Mongolia
B. Bhutan
C. Macedonia
D. None

As one of the highest countries in the world, Mongolia is subjected to extreme continental weather conditions consisting of short, sweltering summers and long, frigid winters. Known by legend as the ‘Land of the Blue Sky, the Mongolian sky is cloudless for more than two thirds of the year.