The electric field of a uniform plane electromagnetic wave in free space, along the positive x direction, is given by $$\overrightarrow E = 10\left( {{{\hat a}_y} + j{{\hat a}_z}} \right){e^{ - j25x}}.$$     The frequency and polarization of the wave, respectively, are

A. 1.2 GHz and left circular

B. 4 Hz and left circular

C. 1.2 GHz and right circular

D. 4 GHz and right circular

Answer: Option A