Hello aspirant

You must apply code 5 .

Code 1 is applicable to those candidates who are in class xii , appearing for board exams .

Code 2 is for those candidates who are from nios / CBSE or ICSE board . Droppers must also apply code 2.

Code 3 - Those who have passed class xii board from any recognized university university with physics,  chemistry and biology.

Code 4 - Those whk have given pre medical or pre professional Examination.

Code 5 - Those who have passed first year bsc .

Code 6 Those who have passed bsc from any recognized university.

Code 7 Those who have given Examination equivalent to intermediate . Foreign candidates must also apply this code .

For details kindly refer the link given below.

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