Which type of seismic wave is recorded by a sesimoraged first during an earthquake ?

There are two broad classes of seismic waves: body waves and surface waves. Body waves travel within the body of Earth. They include P, or primary, waves and S, or secondary, waves. P waves cause the ground to compress and expand, that is, to move back and forth, in the direction of travel.

Ithink it’s b but not 100% sure