Hey Swathi

The code will be 02.

Candidates studying the higher/senior secondary examination or Indian School Certificate Examination (ISCE) which is equivalent to Class 12 examination and comes after a period of 12 years of study must choose this code. The last two years of this study must comprise science subjects namely Physics, Chemistry, Biology/Biotechnology and Mathematics or any other elective subjects with English as a core subject as prescribed by the National Council of Education Research and Training (NCERT). Candidates who have qualified Class 12 in the year 2019 or before and have not pursued any other course after the completion of Class 12 have to choose this code.

for more information:
https://medicine.careers360.com/articles/neet-eligibility-criteria

hope this helped

all the best