Hey congrats on your sucess
I am 2nd year under grad student at IIT Bombay. I would advice you to choose one of the 7 IITs.
Your rank is good enough to get a decent branch in Top 5 IITs.I would strongly insist you to choose IIT Bombay first as it is a bit different from other IITs in many aspects, If you are not intrested in taking up the Branch your getting then choose 1 from next 4 IITs and then Later think abt other two IITs IITR and IITG which are also equally good.
Because I was in a similar situation last year, i can say you to
- Chemical engineering ,IIT Bombay
- engineering physics dual , IIT bombay
- If you are intrested in CS then you can also think about mathamatics and computing at IITG which is better.
- Plz upgrade if useful and in case of further questions ask it below