Assuming that you are from delhi itself so you can almost get any branch which you like in dtu ,nsut ,iiitd provided you have given your crl rank in the question so firstly choosing the college- you should go with either dtu , nsut as both are almost the same though due to more number of students in dtu competition is more so you will have to decide which college in the two you should join , now coming to the branch so it depends whether you are a coding enthusiast or a person interested in core if in coding go ahead with computer science and other branches related to it like software engineering and information technology etc. if you are a core person then decide which core sector excites you most like electrical, mechanical ,chemical ,civil ,physics etc and go ahead with your choice  , talking about placements core  placements are not that lucrative here in these colleges and for that matter in any college so you can even practice coding if you want a good package but want to pursue a core field otherwise cse placements are great in both nsut,dtu.