Answer: Cauvery
Notes: An Right to Information (RTI) activist filed an online petition to the Prime Minister’s Office seeking criminal, departmental and regulatory action over pollution of the Bhavani River. Bhavani River is a major tributary of the Cauvery River. It flows through Kerala and Tamil Nadu and is the second largest river of Tamil Nadu. It originates in the Nilgiri Hills of the Western Ghats. It passes through Silent Valley National Park in Kerala, then re-enters Tamil Nadu. It merges with the Cauvery at Bhavani near Bhavani Sangameshwarar Temple.
