Consider the following statements A and B and identify the correct answer
A) Primary waves travels in a medium with speed of light in all directions.
B) Secondary waves travels in backward direction only but not with speed of light

Primary wave can travel in all directions in ether.
Secondary waves can travel in forward direction in ether
The wavefronts gradually spread in all the directions. So at every point, we have a wave coming out. The primary wavefront is formed and again from the primary wavefront, a secondary waveform is formed and so on. The disturbance does not last for a long time.