I got 258 in neet, I belong to obc(muslim) and belong to tamilnadu. Is there any chance of getting mbbs/bds govt quota?

AS I see your marks in NEET UG 2019 you have very less chances of get Seat in Deemed Or Private Universities Colleges.
Cutoff for this year for getting any private or deemed Colleges you have to score around 550 under AIQ & 580 under state qouta for Open Category.
FOR
You have even less chances to get any seat if you belong to any category under your state.
There are only 60k seats in India. In which 15% seats are under AIQ Qouta.
FOR getting seat in AIQ is Very Difficult if you are from state which have low no. Of College
You can Try for Paid management Seat in top Deemed Universities.
Futher, if you need any assistance you can contact me Personally. 8446739069
Thank You
Piyush Mishra

Dear aspirant,
Sorry but you won't get any seat MBBS or in Dental Medical colleges of Tamilnadu as your marks are too low even in OBC category . last year the cutoff for OBC category was nearly around 543 marks which is very high as compared to your marks so the probability of getting seat in government or private colleges of Tamilnadu is is very low
Keep trying all the best.