Which lists the waves in order of wavelength, from longest to shortest?

X-rays, infrared, radio waves

infrared, visible light, gamma rays

ultraviolet, microwaves, visible light

radio waves, gamma rays, visible light

This comes down to the order of the electromagnetic spectrum.

Waves on the furthest left side of the EM spectrum have the longest wavelengths but the smallest frequencies.

So, it would be:

Infrared, visible light, gamma rays!

:D