Hi Sonam,

If we take a look on the previous year cut off marks for example i am taking the cut off trends for 2017

For Reserved Category the cut off marks were 107 - 130 or 40 percentile and 47382 was the number of OBC candidates who passed the exam. 

If we talk about admission to BDS for which the opening rank for OBC was 5805 whereas closing rank was 10891
You may try visiting this link if you want any further information : https://www.google.com/amp/s/medicine.careers360.com/articles/neet-result/amp

Hope it Helps :)