An electron is moving along +x direction with a velocity of `6 xx 10^6 ms^(-1)` . It enters a region of uniform electric field of 300 V/cm pointing along + y direction. The magnitude and direction of the magnetic field set up in this region such that the electron keeps moving along the x direction will be :

Options

A. `3 xx 10^(-4) T ` , along + z direction
B. `5 xx 10^(-3) T ` , along - z direction
C. `5 xx 10^(-3)T , `along + z direction
D. `3 xx 10^(-4) T ` , along -z direction