The correct answer is: c) Bharalu
The Bharalu River is a tributary of the Brahmaputra River in the Indian state of Assam. It joins the Brahmaputra at Guwahati, the capital of Assam. The Bharalu is a perennial river and is a major source of water for irrigation and drinking water in Guwahati. The river is also a popular spot for fishing and boating.
The Pagladiya River is another tributary of the Brahmaputra River. It joins the Brahmaputra near the town of Goalpara, about 100 kilometers downstream from Guwahati. The Pagladiya is a seasonal river and is not as important as the Bharalu for irrigation and drinking water.
The Manas River is a major river in the Indian state of Assam. It is a tributary of the Brahmaputra River and joins the Brahmaputra near the town of Tezpur, about 200 kilometers downstream from Guwahati. The Manas is a perennial river and is an important source of water for irrigation and drinking water in Assam. The river is also a popular spot for fishing and boating.
The Kolong River is a tributary of the Brahmaputra River. It joins the Brahmaputra near the town of Dibrugarh, about 300 kilometers downstream from Guwahati. The Kolong is a seasonal river and is not as important as the Bharalu or the Manas for irrigation and drinking water.