The correct answer is: Both (A) and (B).
The Shyok River is a tributary of the Indus River, originating in the Karakoram Range in the Ladakh region of India. It flows north and then west through the Ladakh region of India and the Gilgit-Baltistan region of Pakistan, before joining the Indus River near Skardu.
The Zanskar River is a tributary of the Indus River, originating in the Zanskar Range in the Ladakh region of India. It flows south and then west through the Zanskar Valley in the Ladakh region of India, before joining the Indus River near Leh.
Both the Shyok River and the Zanskar River are important tributaries of the Indus River. They provide water for irrigation and drinking water for the people living in the Indus River basin. They also play an important role in the Indus River ecosystem.