The correct sequence showing the different types of electromagnetic waves arranged in increasing order of their frequency is:
A. radio waves, microwaves, visible light, x-rays
The general order of electromagnetic waves from lowest frequency to highest frequency is:
- Radio waves
- Microwaves
- Infrared
- Visible light
- Ultraviolet
- X-rays
- Gamma rays
So, according to this hierarchy, option A is correct.