Which one of the following rivers is NOT a tributary of river Cauvery ?

The Cauvery (or Kaveri) river originates in the Brahmagiri range of the Western Ghats in Karnataka [4]. Its major left-bank tributaries include the Hemavati, Arkavati, Shimsha, and Harangi [4]. Its significant right-bank tributaries are the Amravati, Bhavani, Kabini, and Noyyal [5]. Therefore, Hemavati, Arkavati, and Amravati are all confirmed tributaries of the Cauvery [3]. In contrast, the Indravati is a major left-bank tributary of the Godavari river, originating from the Dandakaranya region and flowing through Chhattisgarh and Odisha before joining the Godavari [5]. Since Indravati belongs to the Godavari river system and not the Cauvery system, it is the correct answer to the question asking which river is NOT a tributary of the Cauvery.

Sources

1. [3] CONTEMPORARY INDIA-I ,Geography, Class IX . NCERT(Revised ed 2025) > Chapter 3: Drainage > The Kaveri Basin > p. 22
2. [4] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 3: The Drainage System of India > THE INTER-STATE WATER DISPUTES > p. 38
3. [2] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 3: The Drainage System of India > Table 3.4 > p. 20
4. [1] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 3: The Drainage System of India > Amravathi River > p. 21
5. [5] INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.) > Chapter 3: Drainage System > River Systems of the Peninsular Drainage > p. 24