If it follows the previous years Trends then your OBC category rank would be somewhere around 4000 to 6000 as there are two attempts so there maybe some changes in the marks vs rank Trends but roughly your rank would lie in the mentioned rank similarly your all India rank would be somewhere around 20,000.

Hii it is very difficult to answer as cutoff varies a lot year to year and from this year pattern have also change so cutoff will vary even if you want to have some rough idea then you can use rank predictor of career 360