The correct answer is (c) Narmada.
A rift valley is a long, narrow depression in the Earth’s crust that is formed when two tectonic plates move apart. The Narmada River flows through a rift valley in central India. The rift valley is about 1,000 kilometers long and 50 kilometers wide. The Narmada River is the fifth-longest river in India. It originates in the Amarkantak hills in Madhya Pradesh and flows through the states of Madhya Pradesh, Gujarat, and Maharashtra. The Narmada River is a major source of irrigation and drinking water for millions of people in India.
The other options are incorrect because they do not flow through a rift valley. The Ganga River flows through the Ganges Plain, which is a floodplain. The Brahmaputra River flows through the Brahmaputra Valley, which is a valley formed by the Brahmaputra River. The Krishna River flows through the Deccan Plateau, which is a plateau in southern India.