সঠিক উত্তর হচ্ছে: Pamir Mountains
ব্যাখ্যা:
Pamir mountains or Pamirs are known as roof of the world because of their height. It is called the roof of the world because they are at high altitude. This range is situated at the junction of many mountains such as Karakoram, Tian shan, Kunlun, Hindukush, Suleman and Hindu Raj mountain ranges. Pamir Range is one of the highest mountain range in the World.