Hi Anuj, 

Yes, the ews qouta are now in work for the admission processes of neet 2019 not only in bihar but in all over the country as per govt.orders. 

And, for this the nta even open the neet registration window before the release of results so that students of ews can add this information in their form and avail its facility.

So ultimately yes in bihar state the ews qouta us applicable for neet 2019.

Good luck.