Hello aspirant

You have got good rank . Your admission in Jadavpur University, Kolkata will depend upon cut off 2020 of jadavpur University. Cutoff varies every year and cutoff depends upon number of candidates appeared and qualified in exam, difficulty level of exam and previous year's cut off.  You are from OBC category so you will get good branch but which branch you will get , can't be predicted.

2019 cut off  for b tech for different branches is given below

General                                      2019 cut off by rank

general                                       1417

obc                                               10538

sc                                                     14366

st                                                       24904

pwd                                                  61552

following link may help you

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