Hi, First of all seats are allotted on the basis of open quota in which students from all quotas participate and preference is given on the basis of AIR. Next will be EWS seats where EWS students will be participating on the basis of EWS category rankings. Next OBC seats which will be filled by OBC, SC and ST students where AIR among these will be compared. Next SC seats which are filled be SC and ST students by giving preference to higher AIR among SC and ST students. Finally ST students where only ST students participate. Hope this helps.