What is true about X-rays and microwaves?

A. X-rays have greater speed than microwaves.

B. X-rays have greater amplitude than microwaves.

C. X-rays have greater frequency than microwaves.

D. X-rays have greater wavelength than microwaves.

I believe the correct answer from the choices listed above is option C. X-rays have greater frequency than microwaves. In a electromagnetic spectrum, the order in increasing frequency is as follows:

radio waves, microwaves, terahertz radiation, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays.