The table below describes geological events.

event boundary where they occur
convergent divergent transform
a yes no no
b yes yes no

which statement is most likely correct?

event a represents earthquakes and event b represents formation of ocean basins.
event a represents formation of ocean basins and event b represents earthquakes.
event a represents volcanic eruption and event b represents creation of mountain ranges.
event a represents creation of mountain ranges and event b represents volcanic eruption.