Hello,

You have not mentioned your state. Considering the cut off in 2019 for ST category under 15% AIQ it is difficult to get seat in BDS in government college with 250 marks. Minimum 430 or above marks are required to have decent chances of getting seat in BDS in government college. Take a look at the cut off marks in 2019 for few BDS colleges under 15% AIQ

• Government Dental College, Pt. BDS University of Health Sciences,Rohtak: 427
• Government Dental College, Shimla: 431
• Government Dental College & Research Institute, Bangalore: 446
• Government Dental College and Hospital, Mumbai : 423

Cut off changes depending on number of candidates qualified, difficulty of exam and number of seats available. So the chances are tough to get seat in BDS. To check cut off for 15% AIQ in 2019 click the link below

https://medicine.careers360.com/articles/neet-cut-off-for-government-colleges

To know the colleges in which you may get seat click the link below

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