Explanation:

- The Deccan Plateau is a large plateau in western and southern India.

- Option 1: Narmada River

- The Narmada River flows westwards between the Vindhya and Satpura ranges.

- The Deccan Plateau lies to the south of the Narmada River.

- Option 2: Krishna River

- The Krishna River flows through Maharashtra, Karnataka, and Andhra Pradesh.

- It lies entirely within the Deccan Plateau.

- Option 3: Kaveri River

- The Kaveri River flows through Karnataka and Tamil Nadu.

- It also lies within the Deccan Plateau.

- Option 4: Penna River

- The Penna River flows through Karnataka and Andhra Pradesh.

- It lies within the Deccan Plateau.