The correct answer is: A. Tons
The Pabbar River is a tributary of the Tons River, which in turn is a tributary of the Yamuna River. The Pabbar River originates in the Garhwal Himalayas in the Indian state of Uttarakhand. It flows for about 200 kilometers before joining the Tons River near the town of Dehradun. The Tons River then flows for about 250 kilometers before joining the Yamuna River near the town of Haridwar. The Yamuna River is a major tributary of the Ganges River. It flows for about 1,370 kilometers before joining the Ganges River near the town of Allahabad. The Ganges River is the longest river in India. It flows for about 2,525 kilometers before emptying into the Bay of Bengal.
The Tons River is a major source of irrigation water for the agricultural fields in the region. It is also a popular destination for fishing and rafting. The Pabbar River is a beautiful river with stunning scenery. It is a great place to relax and enjoy the outdoors.
The other options are incorrect because the Pabbar River is not a tributary of those rivers. The Beas River is a tributary of the Sutlej River. The Ganga River is a tributary of the Brahmaputra River.