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Question

The electric field part of an electromagnetic wave in a medium is represented by
Ex=0,
Ey=(2.5NC)cos[(2π×106 rad/s)t(π×102 rad/m)x],
Ez=0.
The wave is :

A
Moving along x direction with frequency 106 Hz and wavelength 200 m.
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B
Moving along +y direction with frequency 2π×106 Hz and wavelength 200 m.
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C
Moving along +x direction with frequency 106 Hz and wavelength 100 m.
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D
Moving along +x direction with frequency 106 Hz and wavelength 200 m.
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