$A$ plane electromagnetic wave is propagating along the direction $\frac{\hat{i}+\hat{j}}{\sqrt{2}},$ with its polarization along the direction $\hat{k}$. The correct form of the magnetic field of the wave would be (here $B_{0}$ is an appropriate constant)

• A
  $B_{0} \frac{\hat{i}-\hat{j}}{\sqrt{2}} \cos \left(\omega t - k \frac{\hat{i}+\hat{j}}{\sqrt{2}} \cdot \vec{r}\right)$
• B
  $B_{0} \frac{\hat{i}+\hat{j}}{\sqrt{2}} \cos \left(\omega t - k \frac{\hat{i}+\hat{j}}{\sqrt{2}} \cdot \vec{r}\right)$
• C
  $B_{0} \hat{k} \cos \left(\omega t - k \frac{\hat{i}+\hat{j}}{\sqrt{2}} \cdot \vec{r}\right)$
• D
  $B_{0} \frac{\hat{j}-\hat{i}}{\sqrt{2}} \cos \left(\omega t + k \frac{\hat{i}+\hat{j}}{\sqrt{2}} \cdot \vec{r}\right)$