Dear Madesh, according to the NEET 2019 qualification codes, for a B.Sc Student, you should not have anything less than 2 subjects from the lot of Physics, Chemistry, Biology (Botany, Zoology)/Bio technology. And you should have also had Physics, Chemistry, Biology and English as your subjects. But B.Sc Nursing doesnt have those subjects. Am sure, your +2 subjects must have had the required subjects. In such case you have to appear for NEET on the basis of your +2 qualification. This is because, B.Sc Nursing doesnt have the subjects required for NEET. So in your case, your qualification code will be 02. 

Code 2 is for a candidate who has completed their qualifying examination that is equivalent to +2  in your case with subjects like Physics, Chemistry and Biology/Biotechnology. 

Hope this clarifies..

Good luck!