Answer : 2. "Varahi"
Explanation :

1. Kunchikal Falls in Karnataka forms the Varahi River.

2. It is located in Shimoga district of Karnataka state.

3. Forms other waterfalls of Karnataka state.

- Sharavati River: Jog Falls

- Kaveri River: Shivasamudram Falls

- Godavari River: Maneshree Falls

- Krishna River: Hukka Falls

- Kali River: Raphael Falls