Which of the following electromagnetic waves have the minimum frequency?

The frequency range from $3 \times 10^9 \, Hz$ to $3 \times 10^{10} \, Hz$ is known as:

Consider the following statements regarding the electromagnetic spectrum:
$(A)$ The wavelength of microwaves is greater than that of $UV$ rays.
$(B)$ The wavelength of $IR$ rays is less than that of $UV$ rays.
$(C)$ The wavelength of microwaves is lesser than that of $IR$ rays.
$(D)$ Gamma rays have the shortest wavelength in the electromagnetic spectrum.
Which of the above statements are true?

Write short information regarding electromagnetic waves.

The correct order of electromagnetic waves with increasing frequency is

Which of the following represents an infrared wavelength?