The correct answer is (c), Alaknanda Nadi (Satopanth to Devprayag).
The Alaknanda is a river in the Indian state of Uttarakhand. It is one of the two main tributaries of the Ganges, the other being the Yamuna. The Alaknanda originates in the Garhwal Himalayas, at the confluence of the Dhauliganga and the Nandakini rivers. It flows for about 200 kilometers (120 mi) before joining the Bhagirathi River at Devprayag to form the Ganges.
The Alaknanda is a perennial river, meaning that it flows year-round. It is a major source of water for irrigation and hydroelectric power in Uttarakhand. The river is also a popular destination for tourism, with many people visiting the Alaknanda Valley to go white-water rafting, trekking, and camping.
The other options are incorrect because they are not perennial rivers. The Kali Nadi is a seasonal river that flows only during the monsoon season. The Bhagirathi Nadi is a tributary of the Alaknanda River, and the Ram Ganga Nadi West is a tributary of the Yamuna River.
The Alaknanda is a beautiful and important river that plays a vital role in the lives of the people of Uttarakhand. It is a source of water, food, and livelihood for millions of people. The river is also a major tourist destination, and its beauty and natural splendor attract visitors from all over the world.