Hello student,

With a rank of 24,000 in the OBC category, you have chances of getting into NIT's, but not the top ones and in courses like metallurgical and materials engineering, bio technology or production engineering only. In 2018, the closing rank for OBC was around 20,000-22,000. However you can predict the college which you are likely to get using the given link

https://engineering.careers360.com/jee-main-college-predictor

Good luck