Hello shubham

Your OBC rank is 990 so you have chances of getting a seat in MMMUT gorakhpur.   For CSE or IT   ,it depends upon cut off of college ,cut off depends upon number of candidates appeared and qualified in exam, difficulty level of exam, previous year's cut off and availability of seats etc.

Expected cut off for MMMUT for general and ibc Category are as follows

Course             general.                  OBC

B tech CSE -     8222-17043.         24713-28196

B tech ece     20073-21804.        31425-31563

CivilEngineering 24556-25315.    33334-34310

Mechanical        21430- 23309.      31151- 34172

Chemical.          26643- 26747.        34152-34152

Engineering

For College prediction following link will help you

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer