Answer:
It's none of the choices. Hence, the region from radio to infrared has longer wavelengths than visible light.
Explanation:
Radio waves have a wavelength of 1000
Microwaves have a wavelength of 0.1
Infrared has a wavelength of 0.0001
Visible light has a wavelength of 0.00001
Out of all these wavelengths, visible lights has the shortest one.
