Ans:(b) and (d)

Explanation:

As the electromagnetic wave is plane polarized and its propagation is in x direction. So, direction of $\overrightarrow{\mathrm{E} }\mathrm{and} \overrightarrow{\mathrm{B}}$ will be in either y and z direction (or) z and y direction. So, verifies answers (b) and (d)