Answer: The correct option is (C) Wave A.
Explanation :
Radio waves are the waves in the electromagnetic spectrum having a longer wavelength and smaller frequency.
The wavelength of a wave is defined as the distance between two consecutive crests or trough.
In wave A the wavelength is maximum out of the other three waves. So, we can say that wave A shows radio waves.
Hence, the correct option is (C) " Wave A".
