it can be within 2000. still try the rank predictor for a better result and prediction.

Deep according to last year marks vs rank distribution with 97 marks in JEE Advanced exam 2018 you can get a rank in the range of 1000-1500 but as you know according to coaching's experts this time paper was a little difficult plus there was no error in the question paper (last year 18 marks were allotted to each student because of error in question paper) so it is expected the cut-off of each category will go down and with the same marks you can expect a rank to be around 1000 in your SC category.

Feel free to ask if you have any more queries. All the best!!