Hi Saikiran,

Congratualtions for bagging such a great rank to your sister and you too. IITs release a cut-off marks which shows all the categories and the required ranks to get into respective branches of engineering. According to the previous year's ranks I can tentatively say that you can get a good IIT based on your rank but you may have to compromise on your branch. 

I'm providing the link to the source list for the infomation. 

https://engineering.careers360.com/articles/jee-advanced-cutoff

I hope I was able to clear your doubts.

Feel free to put up your queries on the portal.

Thank you