An electromagnetic wave in vacuum has the electric and magnetic field `vecE` and `vecB`, which are always perpendicular to each other. The direction of polarization is given by `vecX` and that of wave propagation by `vecK`. Then

Options

A. `vec(X)||vec(B)` and `hatk||vec(B) xx vec(E)`
B. `vec(X)||vec(E)` and `hatk||vec(E) xx vec(B)`
C. `vec(X)||vec(B)` and `hatk||vec(E) xx vec(B)`
D. `vec(X)||vec(E)` and `hatk||vec(B) xx vec(E)`

Answer

B