Which type of convergent boundary do you think will NOT have any deep ocean trenches?

Continental/Continental

Continental/Oceanic

Oceanic/Oceanic

Continental/Continental

Explanation:

Continental/Continental convergence will not produce any deep ocean trenches. In fact, they will produce towering mountain ranges.

The reason for this is that both continental crusts have nearly the same density. When two lithospheric plates having the same density which is less than that of the mantle below, they will build up when pulled together.

The continental/oceanic and oceanic/oceanic convergence will form deep ocean trenches. Oceanic crusts are typically denser than the mantle below and when they collide with continental crusts, they simply subduct. The zone between a subducted plate and the other is called a subduction zone and this forms very deep ocean trenches.