The Indus River drains the Kashmir Valley. The Kashmir Valley is a valley in the northwestern Himalayas, located in the Indian state of Jammu and Kashmir. The valley is approximately 135 kilometers (84 mi) long and 32 kilometers (20 mi) wide, and is surrounded by the Pir Panjal Range to the south and the Karakoram Range to the north. The Indus River flows through the valley from east to west, and is joined by several tributaries, including the Jhelum River, the Chenab River, and the Ravi River. The Kashmir Valley is a popular tourist destination, and is known for its scenic beauty, its lakes, and its Mughal gardens.
The other options are incorrect because they are not valleys. Rupshu is a plateau in Ladakh, India. Leh is a city in Ladakh, India. Shyok is a river in Ladakh, India.