520 in neet 2019 chance in bihar general category under state domesile

Hi,  with 520 marks government colleges in bihar are out of your reach for both mbbs and bds courses. You can definitely get a private college with this score. You need to know that cutoffs vary every year according to the difficulty of the paper and performance of other students in it. So if cutoffs go South a little, you could bag a bds seat at Patna dental college(522 current cutoff).
You can use the following college predictor to know which private or govt colleges you can get.
https://medicine.careers360.com/neet-college-predictor