Consider an electromagnetic wave propagating in vacuum. Choose the correct statement:

For an electromagnetic wave propagating in $\displaystyle +x$ direction the electric field is $$\vec{E}=\frac{1}{\sqrt{2}} E_{y z}(x, t)(\hat{y}-\hat{z}) \text { and the } $$ magnetic field is $$\vec{B}=\frac{1}{\sqrt{2}} B_{y z}(x, t)(\hat{y}+\hat{z}) $$

For an electromagnetic wave propagating in $\displaystyle +x$ direction the electric field is $$\vec{E}=\frac{1}{\sqrt{2}} E_{y z}(y, z, t)(\hat{y}+\hat{z}) \text { and } $$ the magnetic field is $$\vec{B}=\frac{1}{\sqrt{2}} B_{y z}(y, z, t)(\hat{y}+\hat{z}) $$

For an electromagnetic wave propagating in $\displaystyle +y$ direction the electric field is $\displaystyle \vec{E}=\frac{1}{\sqrt{2}} E_{y z}(x, t) \hat{y}$ and the magnetic field is $$\vec{B}=\frac{1}{\sqrt{2}} B_{y z}(x, t) \hat{z} $$

For an electromagnetic wave propagating in $\displaystyle +y$ direction the electric field is $\displaystyle \vec{E}=\frac{1}{\sqrt{2}} E_{y z}(x, t) \hat{z}$ and the magnetic field is $$\vec{B}=\frac{1}{\sqrt{2}} B_z(x, t) \hat{y} $$