See if you do a BSc with the subjects such as Physics, Chemistry, BIology/Biotechnology and if you have passed this subjects including the practicals in the first year, then you have to use the code 5. If you have done BSc with some other subjects, then you will accounted as droppers and you have to use the code 2.

To know more about the 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!