The scholarship criteria differs in many respects. Now there is no choice of the scholarship by the admission committe or by the institute. Now may be you are getting the scholarship through your cast or through any organization and like. Now when you apply for the scholarship anywhere then there is a criteria mentioned always for the one who is seeking for the scholarship. So you need to go through those details first and then apply for the scholarship. Second thing is that your marks are very less so getting the BDS itself would be the difficult task for you. So if you want to get into dental courses then you will be getting the private institute only and if the scholarship is applicable for you then you simply apply and wait.