I got 714 air in jee adv.2018.acc. to branch predictors i am getting kharagpur E.C.E , Kanpur EEE and C.S BHU. Of these where should i join?

Wow, contracts for such a good rank in jee adv. ECE in IIT KGP is a very good choice , and the electronics field has immense scope ahead including robotic tech. Second option can be CS in BHU because that is very much job oriented.but if you want to go to CS Kanpur is almost above IIT BHU.All the very best!