hii aftaab,
in aligarh muslim university, you have to simply fill branches in your order of preference. branch will be allotted according to your rank and preference, you can also choose to upgrade it later if possible.
Good luck...
Candidates can check B.Tech Cut off for Top IITs & NITs here.
Eligibility | Application | Exam Pattern | Admit Card | Answer Key | Result | Cutoff
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile