Difference between code 2 and code 3 for NEET 2020

Bikahs, Code 02 says: The Higher/Senior Secondary Examination or the Indian School Certificate Examination which is equivalent to 10+2 Higher/Senior Secondary Examination after a period of 12 years study, the last two years of such study comprising of Physics, Chemistry, Biology/Bio-technology (which shall include practical tests in these subjects) and Mathematics or any other elective subject with English at a level not less than the core course for English as prescribed by the National Council of Educational Research and Training after introduction of the 10+2+3 educational structure as recommended by the National Committee on Education.

It is for Candidates who have completed their 10+2 from any State except for Karnataka. They must have completed their 12th in 2019 or before.

Code 03 says: The Intermediate/Pre-degree Examination in Science of an Indian University/Board or other recognised examining body with Physics, Chemistry, Biology /Biotechnology (which shall include practical test in these subjects) and also English as a compulsory subject.

This is for Candidates who have completed their 12th from Karnataka in 2019 or before that. Karnataka board has Pre-University Course and so this is for students belonging to Karnataka.