Hello,

Yes you are eligible to give neet entrance exam if you have physics, chemistry and biology as your main subject.

As you are pursuing your bsc course you are also able to give this entrance.

The only difference is you have to fill different code while filling your application form.

For General category candidates, it is mandatory to score 50% marks in 12th grade, whereas SC/ST/OBC category candidates must score 40% marks to become eligible for NEET 2021.

https://medicine.careers360.com/articles/neet-eligibility-criteria/amp

You can also refer to this link for more information.

Hope this helps!!!