Hii,If you are joining in a college by looking only at the placement count in that year then your first step went wrong because who knows the situation after 4 years(at the time of completion of btech). No one can tell what happens next year, so dont depend only on placements see all the factors that matters like staff, curricular or technical stuff, extracurricular activities, clubs, events, ratings and most important is alumina.

Just grow as much as you can in 4 years, you will be for sure in a better position than others. In my view CBIT is the best among the 3 colleges.