The correct answer is A) Krishna.
The Krishna River is the second-longest river in India, after the Ganges. It flows through the states of Maharashtra, Karnataka, Andhra Pradesh, and Telangana. The Krishna River is a major source of irrigation and drinking water for millions of people in India. It is also a popular destination for river rafting and kayaking.
The Cauvery River is the longest river in the Indian state of Karnataka. It is also the third-longest river in the Peninsular India. The Cauvery River is a major source of irrigation and drinking water for millions of people in Karnataka and Tamil Nadu. It is also a popular destination for river rafting and kayaking.
The Kali River is a river in the Indian states of Karnataka and Kerala. It is a tributary of the Sharavati River. The Kali River is a popular destination for river rafting and kayaking.
The Tungabhadra River is a river in the Indian states of Karnataka and Andhra Pradesh. It is a tributary of the Krishna River. The Tungabhadra River is a popular destination for river rafting and kayaking.
In conclusion, the Krishna River is the most popular river for river rafting and kayaking in Karnataka.