Dear aspirant,

As you have mentioned that you are already enrolled in college and in BA psychology and you want to take admission st. Xavier's College.

So, I would suggest you to ask the college officials what all you would be requiring to get yourself out of the college. They would be asking some documents or rather they would be giving some documents. It is better to ask the college officials about the procedure.

But I don't think st. Xavier's would be allowing you to take admission in 3rd semester directly until and unless you are have some sources.