Question

When an oceanic plate collides with a continental plate:

the oceanic plate is forced beneath the continental plate
the oceanic plate is folded into mountain ranges
both plates sink into the fluid mantle
both plates are folded into mountain ranges

Answer 1

the oceanic plate is forced beneath the continental plate. The oceanic plate is denser than the continental plate, making it sink. A good example of this is the west coast of south america. The oceanic plate sinks, and when the water that gets "dragged" under gets to boiling point, it creates explosive volcanos. Chile and Peru's coast are all mountains which are associated with those events.

Answer 2

(Or so i learned)