Answer:
C) X-ray radiation will strip away electrons because it has a shorter wavelength and therefore more energy
Step-by-step explanation:
The energy of an electromagnetic wave is inversely proportional to its wavelength, according to the equation:

where
h is the Planck constant
c is the speed of light
is the wavelength
In this problem, we are asked which electromagnetic wave is most likely to extract electrons from the zinc plate: the answer is 'the electromagnetic wave which carries more energy', which means the electromagnetic wave with shortest wavelength (given the equation above).
In order from shortest to longest wavelength, electromagnetic waves are:
Gamma rays
X rays
Ultraviolet
Visible light
Infrared
Microwaves
Radio waves
Among the choices provided, X-ray (choice C) are the electromagnetic waves with shortest wavelength, so they are the waves with highest energy, therefore choice C is the correct answer.