In the electromagnetic spectrum,the visible light region lies between which of the following?

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?

To which region of the electromagnetic spectrum does the frequency $1\, GHz$ correspond?

Which electromagnetic waves are used in the medical field to destroy cancer cells?

Which of the following radiations of electromagnetic waves has the highest wavelength?

One requires $11 \ eV$ of energy to dissociate a carbon monoxide molecule into carbon and oxygen atoms. The minimum frequency of the appropriate electromagnetic radiation to achieve the dissociation lies in