Hello there!

Yes, you can apply for all the available choices of colleges listed in the choice filling section. In order to opt colleges of Deemed University, you need to pay an extra amount as security deposit, which I assume is paid by you during the registration.

Fill your choices, based on your preference. Opt that college first where you have more chances of getting a seat.

This college predictor tool will help you in doing so by predicting the expected colleges where you have a chance of getting your admission, based on your NEET score.

https://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer

I hope this answer resolves your query.

Good Luck!