As you are a 2nd year student then you have passed the 1st year University examination. Now as per the rules of NEET, if anyone have passed 1st year of college with Physics, Chemistry & Biology as a subject, then he/she can apply with Code-4. But as you don't have Physics in your UG curriculum, you can't use the code-4.

You have to use the code-2 which is essentially for droppers.

For the detailed overview of NEET codes consider the link provided below:

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

I hope this helps. Wish you a great day!