Explanation:

- Option 1: The Trimbak hills

- The Trimbak hills are associated with the Godavari River.

- Located in Maharashtra.

- Option 2: The Amarkantak plateau

- The Amarkantak plateau is where the Narmada River originates.

- Situated in Madhya Pradesh.

- Option 3: The Brahmagiri hills

- The Kaveri River rises in the Brahmagiri hills.

- These hills are located in the Western Ghats of Karnataka, near Coorg.

- Option 4: Mahabaleshwar

- Mahabaleshwar is the source of the Krishna River.

- Found in the Western Ghats of Maharashtra.