Hello khusboo

There is no sure shot chance that you  will get admission in BLAT 2019  because seats in BHU for law graduate candidate are very less so due to this cutoff is high and admission is difficult and OBC factor will help only on cutoff valuation. 

Hope my answer will help you 

Best of luck

Yes since you are obc candidate and a girl also  so you can get admitted to BHU for law. 

As girls and obc quota both are applied so you can get admission easily.