The length of Pakistan China border is

The Pakistan China border also known as the Khunjerab Pass border stretches for 599 kilometers. It lies in the Gilgit Baltistan region of Pakistan and connects with the Xinjiang province of China. This border is of strategic and economic importance as it is part of the China Pakistan Economic Corridor CPEC. The Karakoram Highway passes through this border making it a vital trade route. The region is mountainous and covered with snow most of the year. The border symbolizes strong friendship between the two countries. Therefore the correct answer is option C which is 599 km.