A plane polarized electromagnetic wave is travelling in free space along + x direction. The amplitude of Its electric field is E0 = 240 N/C and its frequency is 150 MHz. The magnetic field of the wave can be written as:

• A. B = {(800 nT) sin [(3.14 rad/m) x + (9.42 × 108 rad/s)t]} k̂
• B. B = {(800 nT) sin [(3.14 rad/m) x - (9.42 × 108 rad/s)t]} k̂
• C. B = {(240 nT) sin [(2.09 rad/m) x - (6.27 × 108 rad/s)t]} k̂
• D. B = {(240 nT) sin [(2.09 rad/m) x + (6.27 × 108 rad/s)t]} k̂