If you have provided the correct category in your AIAPGET application then you would get the correct category in your AIAPGET marksheet. So you can can't change the category in your marksheet you must check the category you have provided in your application. If you have inserted 2A and got General in Marksheet then you have to contact the AIAPGET authority but such things usually don't occur.

To know more about AIAPGET visit the link below:

https://medicine.careers360.com/exams/aiapget

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