With the wavelength of 200 nm, a particular electromagnetic radiation:-
has a greater energy per photon than the radiation with a wavelength 100 nm.
is in the visible region of the electromagnetic spectrum
has a higher frequency than radiation with wavelength 400 nm
has a greater speed in vacuum thaw does radiation of wavelength 400 nm
Frequency is inversely proportional to the wavelength of radiation.
Option (3) is correct.