Q. Which of the following is known as the ‘Roof of the World'?
Answer: Pamir Knot
Notes: Pamir knot is called the roof of the world because they are at high altitude. The Pamir Mountains are a mountain range in Central Asia formed by the junction of the Himalayas with Tian Shan, Karakoram, Kunlun, and Hindu Kush ranges.

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