An electron is moving along +x-direction with a velocity of 6×106 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
(a) 3×10−4 T, along +z-direction
(b) 5×10−3 T, along −z-direction
(c) 5×10−3 T, along +z-direction
(d) 3×10−4 T, along −z-direction