The correct answer is: a) Indus River.
The Sutlej River is an important tributary of the Indus River. It is the longest of the five rivers that flow through the Indian state of Punjab. The Sutlej River originates in the Himalayas in Tibet and flows through India and Pakistan before joining the Indus River near Mithankot in Pakistan. The Sutlej River is a major source of irrigation water for the Punjab region. It is also a popular destination for fishing and boating.
The Ganga River is the longest river in India and the third longest river in Asia. It is a sacred river for Hindus and is also a major source of irrigation water and hydroelectric power. The Ganga River originates in the Himalayas and flows through the states of Uttarakhand, Uttar Pradesh, Bihar, Jharkhand, and West Bengal before emptying into the Bay of Bengal.
The Brahmaputra River is the longest river in India and the ninth longest river in the world. It is a major source of irrigation water and hydroelectric power. The Brahmaputra River originates in the Himalayas in Tibet and flows through the states of Arunachal Pradesh, Assam, and Meghalaya before emptying into the Bay of Bengal.
The Narmada River is the fifth longest river in India. It is a major source of irrigation water and hydroelectric power. The Narmada River originates in the Satpura Range in Madhya Pradesh and flows through the states of Madhya Pradesh, Gujarat, and Maharashtra before emptying into the Arabian Sea.