Which of the following can be produced at an ocean continental convergence

When two plates converge, what happens depends on the types of lithosphere that meet. The three possibilities are oceanic crust to oceanic crust, oceanic crust to continental crust, or continental crust to continental crust. If at least one of the slabs of lithosphere is oceanic, that oceanic plate will plunge into the trench and back into the mantle. The meeting of two enormous slabs of lithosphere and subduction of one results in magma generation and earthquakes. If both plates meet with continental crust, there will be mountain building. Each of the three possibilities is discussed in a different concept. https://www.ck12.org/earth-science/ocean-continent-convergent-plate-boundaries/lesson/Ocean-Continen...

The higher you go up the less oxygen there is 

Maybe haha