The magnetic field of a light wave at given time parallel to y-axis and is given by $B=B_m \sin(kz-wt)$. In what direction does the wave travel and parallel to which axis does the associated electric field point at that time?

positive direction of z; x-axis

$B=B_m \sin(kz-wt)$ in this equation magnetic field is travelling along Z - Axis.

Electric field is perpendicular to both magnetic field and direction of propagation i.e along x-axis.

The correct answer is Option (2) → positive direction of z; x-axis