Explanation:

Only statements 1,3&4 are correct.

Recently, The Cauvery water-sharing issue between Karnataka and Tamil Nadu has flared up again, despite the Supreme Court giving its verdict on the 200-year-old dispute in 2018. The trigger this time is the poor rainfall in the river’s catchment area in Karnataka.

Tributaries of Cauvery River

• Left Bank: the Harangi, the Hemavati, the Shimsha, and the Arkavati.

• Right Bank: Lakshmantirtha, the Kabani, the Suvarnavati, the Bhavani, the Noyil, and the Amaravati.

• The  principal tributaries of the  Godavari river are the Pravara, the Purna, the Manjra, the Penganga, the Wardha,the Wainganga the Pranhita (combined flow of Wainganga, Penganga, Wardha), the Indravati, the Maner and the Sabri.

Hence option 3rd is correct.