The correct answer is (c). Assam is primarily situated in the Brahmaputra river basin. The Brahmaputra is the main river in the state, and it flows through the entire length of Assam. The river is a major source of water for irrigation, drinking water, and hydroelectric power in the state. The Brahmaputra is also a major transportation route for Assam.
The Indus river basin is located in the northwestern part of India. The Indus is the longest river in Pakistan, and it is also a major river in India. The Indus is a major source of water for irrigation, drinking water, and hydroelectric power in both India and Pakistan.
The Ganga river basin is located in the northern part of India. The Ganga is the longest river in India, and it is also a major river in Nepal. The Ganga is a major source of water for irrigation, drinking water, and hydroelectric power in India.
The Narmada river basin is located in the central part of India. The Narmada is the fifth-longest river in India, and it is also a major river in Madhya Pradesh. The Narmada is a major source of water for irrigation, drinking water, and hydroelectric power in Madhya Pradesh.