Question

Which of these has the shortest wavelength?

A.uv light with a frequency = 1.5 x 10¹⁵ Hz

B.Green light with a wavelength = 589 nm

C.Radio wave with a wavelength = 200 m

D.X-ray with a frequency = 3 x 10¹⁸ Hz

E.uv light with a wavelength = 180 nm

Please explain answer