0. Through which States does Cauvery River flow?
The correct answer is:
B. Karnataka, Kerala, Tamil Nadu
The Cauvery River originates at Talakaveri in the Western Ghats of Karnataka.
It then flows through Tamil Nadu, where it forms a large delta before emptying into the Bay of Bengal.
Some of its tributaries, like the Kabini, rise partly in Kerala, so the river basin also extends into Kerala.
Therefore, the correct set of states through which the Cauvery river or its basin extends is Karnataka, Kerala, and Tamil Nadu.