The correct answer is: D. Indus
The Soan River is a tributary of the Indus River. It originates in the Pir Panjal Range in the Indian state of Jammu and Kashmir, and flows through the Pakistani provinces of Punjab and Khyber Pakhtunkhwa. The Soan River joins the Indus River near Attock, Pakistan.
The Soan River is a major source of irrigation for the Indus River basin. It is also a popular destination for fishing and boating.
The Beas River is a tributary of the Sutlej River. It originates in the Himalayas in the Indian state of Himachal Pradesh, and flows through the states of Punjab and Haryana. The Beas River joins the Sutlej River near Harike Barrage, India.
The Sutlej River is a tributary of the Indus River. It originates in the Himalayas in the Tibetan Autonomous Region of China, and flows through the Indian states of Himachal Pradesh, Punjab, and Haryana. The Sutlej River joins the Indus River near Mithankot, Pakistan.
The Ganga River is the longest river in India and the third longest river in Asia. It originates in the Himalayas in the Indian state of Uttarakhand, and flows through the states of Uttar Pradesh, Bihar, Jharkhand, and West Bengal. The Ganga River joins the Bay of Bengal near Kolkata, India.