Out of the following options which one can be used to produce a propagating electromagnetic wave?

Accelerating charge particles are used as a source to generate electromagnetic waves. A stationary charge produces an electric field, but no magnetic field. A charge moving at a constant velocity produces both an electric and a magnetic field, but these fields do not change with time and thus do not constitute a propagating electromagnetic wave. Only an accelerating charge produces time-varying electric and magnetic fields that propagate outward as an electromagnetic wave.