Hey Aslam! Thanks for contacting careers 360.

Well, aiming to study in iit is really good. Not many people having the courage and determination to do it.

You can refer to the iit branches below.

https://engineering.careers360.com/articles/best-iits-for-top-engineering-branches

To get into iit firstly you need to write a qualification exam called JEE. After writing this exam depending on the marks you scored in this exam you can be placed into different iit's in India. 

Wish you all the best!