If your document verification is completed, then you will not need the Documents any more and the xerox copy will work. But if your document verification isn't done i.e., your provisional admission isn't confirmed then you need to have the original documents. Also having the original document for future purpose is always beneficial.

To know more about the Karnataka PGCET, visit the link below:

https://bschool.careers360.com/articles/karnataka-pgcet-mba

I hope this answer helps. All the very best for your future endeavors!