Consider the following statements

1. The Indian subcontinent is bordered by the Himalayas on the north, the Arakan ranges on the east, and the Hindukush range on the west.
2. The topography of the Indian subcontinent consists of high mountain peaks, vast plains, desert regions, plateaus formed of hard rocks, coastal plains, and islands.
3.  The Pamir Knot, known as the roof of the world, is the meeting point of the Tian Shan, Karakoram, Kunlun, and Hindukush mountain ranges.

Which of the above statements is/are correct?