Correct Answer:
B. Pamir Knot
The correct answer is the Pamir Knot. The Pamir Knot is a crucial orographic junction in Central Asia where several of the world's highest and most significant mountain ranges converge. These include the Karakoram, Hindu Kush, and Himalayan ranges, along with the Tian Shan and Kunlun mountains. It is a geographically vital region often referred to as the "Roof of the World." The Everest Summit is a single peak, the Tibetan Plateau is a vast high-altitude region, and the Khyber Pass is a specific mountain pass, none of which represent the convergence point of these major mountain systems.