Electromagnetic Waves: JEE Main 2020 Physics question

A plane electromagnetic wave of frequency 25 GHz is propagating in vacuum along the z-direction. At a particular point in space and time, the magnetic field is given by $\overrightarrow B = 5 \times {10^{ - 8}}\widehat jT$. The corresponding electric field $\overrightarrow E$ is (speed of light c = 3 × 10⁸ ms^–1)