The movement of tectonic plates in two locations is described below:

Location A: Tectonic plates collide and one plate moves over the other while the other plate is pushed deep into the mantle
Location B: Tectonic plates slide past each other

Which statement is most likely correct?

1. Volcanic eruptions may occur in both locations.

2. There is no chance of earthquakes in the two locations.

3. Mountains may form in Location B but not in Location A.

4. Subduction happens in Location A but not in Location B.