K2 (Godwin-Austen) at 8,611m is the second highest peak in the world and the highest among the options given. Kanchenjunga (8,586m) is third highest, Nanga Parbat (8,126m) is ninth highest, and Nanda Devi (7,816m) is 23rd highest. K2 is located in the Karakoram range on the China-Pakistan border.