But I came from St category
And iit have reservation of all category

Of course all the IIT's have reservations for different categories.With the marks which you mentioned previously..you would definitely get a better college with around 6000-7000 rank. But ranking is not made based on the category , it is made similar strategy for all the categories. While alloting the seats, you are given much priority than other students.Better use this link for clear information..https://www.google.com/amp/s/engineering.careers360.com/articles/jee-advanced-cutoff-for-iits/amp .Thank you and I hope this would help you