Hi Kishore!

To get into these top IITs, the closing rank irrespective of branches are as follows:

1. IIT DELHI (4403-6549) MIN>AGGREGATE MARKS-----35
2. IIT BOMBAY (3501-4869) MIN>AGGREGATE MARKS-----35
3. IIT KANPUR (4801-6292) MIN>AGGREGATE MARKS-----35
4. IIT KHARAGPUR (4990-5454) MIN>AGGREGATE MARKS-----35

These are min. marks range from which you can just get into IITs but in lower branches. As the marks range varies from branch to branch you have to first choose, in which branch you want to get in admission.

You can check Career 360's article to check branch wise min. rank to get into top IITS.

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

HAPPY HUSTLING!