As you didn't have done your graduation with the PCB/Biotechnology subject then you will be accounted as a dropper and you can use the code 2. If you have PCB combination in graduation then you may use the other codes. But as you have done BA you have to use the code 2.

The code 2 is for those students:

• Completed 12 years of school education from CBSE/ICSE or any other boards with the last 2 years having the subjects English, Physics, Chemistry, Biology/Biotechnology, or Mathematics or any other elective as a major subject .
• Students who have passed from NIOS/other open schooling board with Biology/Biotechnology as one of the subject in 10+2.
• For the droppers.

To know more about NEET codes visit the link below:

https://medicine.careers360.com/articles/neet-qualification-codes

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