Hello Abhishek,

I won't be able to tell you exact rank for cutoff for this but I will tell you the opening and closing ranks for cs that has been for the past few years and I'm pretty sure that'll help you get some idea.

In 2017 : 

For general category: Opening rank - 850 and Closing rank - 2950

For SC category: Opening rank - 438 and Closing rank - 438

For ST category: Opening rank - 246 and Closing rank - 246

For OBC category: Opening rank - 357 and Closing rank - 766

In 2016 : 

For general category: Opening rank - 979 and Closing rank - 1083

For SC category: Opening rank - 198 and Closing rank - 198

For ST category: Opening rank - 205 and Closing rank - 205

For OBC category: Opening rank - 303 and Closing rank - 399

In 2015 : 

For general category: Opening rank - 293 and Closing rank - 1233

For SC category: Opening rank - 23 and Closing rank - 97

For ST category: Opening rank - 45 and Closing rank - 449

For OBC category: Opening rank - 204 and Closing rank - 498

Hope this helps. You can contact for any further guidelines.