chemical engg. or a Engg. Physics ?

My first preference from two of branches should be?

i like both of them ! and i want to pursue a research job .

I must say that you did a good job by getting an opportunity to get a degree with these two top rated branches, but let me tell you that it is a matter of personal choice to make out what interests you the most and so, single mindedly, go for that. If you wish to go for a  critical analysis, then add a few more branches as well as institutions to your list. You may consider – VIT, Vellore,................SRM, Chennai,..................Lovely Professional University, Phagwara