Light wave is travelling along y-direction. If the corresponding $\overrightarrow{\mathrm{E}}$ vector at any time is along the x-axis, the direction of $\overrightarrow{\mathrm{B}}$ vector at that time is along

• A

  y-axis

• B

  x-axis

• C

  + z-axis

• D

  $- \mathrm{z}\text{ axis }$