Are volcanic island arcs caused by ocean-continent convergent boundaries, ocean-ocean convergent boundaries, or both?

volcanic island arcs caused by ocean-ocean convergent boundaries.

Explanation:

The geological features that are found in the continent-ocean convergent plate boundary are the deep sea trenches and continental volcanic arc.

Continental volcanic arc is that arc shaped volcanic mountain chain formed due to the subduction of oceanic plate within the continental plate.

While Volcanic island arc are formed when both the plates are oceanic and one subducts inside the other. The arc shape of the mountain chains is formed due the spherical shape of the earth.

Volcanic Island arc caused by ocean-ocean convergent boundaries. In this convergence, the denser oceanic plate get subducts below the less denser oceanic plate forming a trench along the boundary.