Use the Following Figure for the Next Problem $\theta$ = 25 ^$\circ$

Use the following figure for the next problem.
-The electrons coming out of the electron gun in an electron microscope are being accelerated by a potential of 100 kV.The electrons then pass through a region of magnetic field of distance y = 8 cm which points perpendicularly to the direction of travel of the electron.What is the strength of the magnetic field needed to deflect the electron by an angle of $\theta$ = 25 ^$\circ$ ? (Ignore any relativistic effect.1 Gauss = 10^-4 T)

A) 120.1 Gauss
B) 30.4 Gauss
C) 21.8 Gauss
D) 14.6 Gauss
E) None of these is correct.