Of the following radiation with
(i)Maximum wavelength out of UV, Radiowaves, x-rays, IR
(ii) Lowest frequency out of IR,wavelength out of UV, Radiowaves, x-rays, IR
(ii) Lowest frequency out of IR, ϒ-rays, cosmic rays and microwaves
(i) - Radiowaves,(ii) -Microwaves
Do you remember the spectrum of electro-magnetic radiation?
Just take a look at it.