sir i want to fill neet application form but i had completed my bsc first year and then i leaved bsc and started neet preparation so at the time of filling form which qualification code i fill?

Hi,
As you haven't completed your B.sc degree after completing 12th standard you also come under droppers. In that case choose code 2 as it's required for aspirants like you.
For detailed information go through the link given below. You will have an brief idea about the code requirements.
https://medicine.careers360.com/articles/neet-eligibility-criteria
Best wishes!