Magnetics

A proton moving with a constant velocity passes through a region of space without any change in its velocity. If \(\overrightarrow{\mathrm{E}}\) and \(\overrightarrow{\mathrm{B}}\) represent the electric and magnetic fields respectively, then the region of space may have :

(A) \(\mathrm{E}=0, \mathrm{~B}=0\)

(B) \(\mathrm{E}=0, \mathrm{~B} \neq 0\)

(C) \(\mathrm{E} \neq 0, \mathrm{~B}=0\)

(D) \(\mathrm{E} \neq 0, \mathrm{~B} \neq 0\)

Choose the most appropriate answer from the options given below :