Hello Aspirant,

Don't get confused because as you have mentioned that you had passed your class 12th in 2020 and if you did not take admission in any bachelor's program means you are a dropper and therefore your highest qualification will be considered as 10+2/Intermediate therefore Code 02 is applicable on you.

Code 03 is used by those candidates who have passed their intermediate/pre-examination degree  with Physics, Chemistry, Biology/Biotechnology and English and PCB subjects should also contain their practical exams.

You can check out complete details about NEET qualifying codes from the link given below :-

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

To get live updates and complete details about NEET 2021 application kindly visit the link given below :-

https://medicine.careers360.com/articles/neet-application-form

You can also solve the Test series for NEET 2021 for better finishing of your preparation, you can get the Test series from the link given below :-

https://learn.careers360.com/test-series-neet-may/?product=56&icn=test-series-neet-may-2021&ici=exam_page

I hope this information helps you.

Good Luck!!