Dear Abhishek, if your highest qualification is +2 with subjects Physics, Chemistry, Biology/Biotechnology and English, then your highest qualification is 02. But your code changes if you have joined B.Sc and have any 2 subjects among Physics, Chemistry, Biology/Biotechnology. Please do let us know if thats the case. 

hii abhishek

you have to choose code number 2 while filling your NEET application form,if you are a dropper.i hope this information helps you.

thank you