The correct answer is: D. Hispar glacier
The Suru River is a river in the Gilgit-Baltistan region of Pakistan. It is a tributary of the Indus River, and is the largest river in the Gilgit-Baltistan region. The Suru River originates from the Hispar glacier, which is located in the Karakoram Range. The Suru River flows through the Gilgit-Baltistan region, and eventually joins the Indus River near the town of Skardu.
The Penzella glacier is located in the Karakoram Range, and is a tributary of the Hunza River. The Baltaro glacier is also located in the Karakoram Range, and is a tributary of the Shyok River. The Biafo glacier is the largest glacier in the Karakoram Range, and is located in the Gilgit-Baltistan region.
The Hispar glacier is a large glacier located in the Karakoram Range in Gilgit-Baltistan, Pakistan. It is the fifth largest glacier in the Karakoram Range, and the largest glacier in Gilgit-Baltistan. The Hispar glacier is about 60 kilometers long, and has a surface area of about 300 square kilometers. The Hispar glacier is a source of water for the Suru River, which is a tributary of the Indus River.