X Rays Are Emitted When the Electrons Hit the Screen $\times$

Multiple Choice

X rays are emitted when the electrons hit the screen in a cathode ray tube (CRT) ,i.e.,an old TV set.If the shortest wavelength X ray emitted is 3.7 $\times$ 10^-2 nm,then what is the voltage that the electrons are accelerated through in the TV set?

A) 2.1 $\times$ 10^-23 V
B) 34 kV
C) 27 V
D) 34 V
E) 27 kV