Which best describes electromagnetic waves moving from gamma rays to radio waves along the electromagnetic spectrum?

wavelength and frequency decrease.
wavelength and frequency increase.
wavelength increases, and frequency decreases.
wavelength decreases, and frequency increases.

The correct answer is :Wavelength increases and frequency decreases.

Explanation:

Electromagnetic waves are traverse waves. Oscillation of these waves are changes between the electric field and magnetic field at right angle to the direction of the wave.

There are 7 types of electromagnetic waves and are named in the order of increasing frequency and decreasing in wavelength:

So, while moving from gamma rays to radio waves the frequency decrease and wavelength increases.