Which is the highest waterfall in India?
A. Godak falls
B. Bandaje falls
C. Kunchikal falls
D. Jog falls

Hint: Waterfalls are areas where flowing river water drops abruptly and nearly vertically. Waterfalls represent major interruptions in river flow; they fall over a rocky ledge into a plunge pool. The wearing away, the process of erosion of Earth, plays an important part in the formation of waterfalls. Waterfalls themselves also contribute to erosion.

Complete step-by-step solution:
Kunchikal is the highest waterfall in India. It is situated in Nidagodu town, close to Masthikatte in the Shimoga area of the province of Karnataka, and is framed by the Varahi River. The absolute tallness of this cascade is 455 meters. This waterfall ranks 116th, in terms of height in the world. The River Varahi flows down from a greater altitude over these rocky structures close to the Hulikal Ghati temple.
A hydroelectric plant is built up under the waterfall, which generates high power electricity. With the construction of the Mani dam, near Masthikatte at the base of the waterfall, most of the water flows into the dam to generate high power hydroelectricity. This has caused a restriction in the visits to the waterfall. Before visiting Kunchikal falls, special permissions need to be acquired. To maintain the serenity of the area, the area surrounding the waterfall is preserved very well. The area is one among the unpolluted ones in the area and it is also well maintained.

Thus, option (C) is correct.

Note: There are many other waterfalls in India like Shivanasamudra falls, Dudhsagar waterfalls, Athirapally waterfalls, Bhagsu waterfalls, Soochippara falls, Bhimlat falls, Iruppu falls, Meenmutty falls, Dhuandhar falls, etc.