$7.$ A hydrogen atom that has lost its electron is moving toward $\backslash (+$x $\backslash )$ direction in a region where the magnetic field is directed toward $\backslash (+$y $\backslash )$ direction. It will be deflected:

A$)\backslash (+$z $\backslash )$ direction

B$)\backslash (-$z $\backslash )$ direction

C$)\backslash (+$y $\backslash )$ direction

D$)\backslash (-$y $\backslash )$ direction

E$)$ not at all