Electrons with energy `80 keV` are incident on the tungsten target of an X - rays tube , k- shell electrons of tungsten have `72.5 keV` energy X- rays emitted by the tube contain only

Options

A. A continuous X-ray spectrum (Bremsstrahlung) with a minimum wavelength of about 0.155Å
B. A continuous X-ray spectrum (Bremsstrahlung) with all wavelengths
C. The characteristic X-ray spectrum of tungsten
D. A continuous X-ray spectrum (Bremsstrahlung) with a minimum wavelength of about ` 0.155 Å` and the characteristics X-ray spectrum of tungsten