The nature of electromagnetic wave is:

Electromagnetic waves are synchronized oscillations of electric and magnetic fields that travel across a vacuum at the speed of light.

The oscillations of the two fields form a transverse wave since they are perpendicular to each other and to the direction of energy and wave propagation.

Thus, the nature of electromagnetic waves is transverse. They move at a specific phase velocity . As a result, they aren't stationary.

Electromagnetic waves include visible light, radio waves, and so on.

Hence, option C i.e transverse is correct