Hello student,

With an IISER Aptitude Test (IAT) all-India rank of 3963, there's a good chance you might get admitted to an IISER, but it depends on the specific IISER and the course you're aiming for.

BS-MS programs are generally more competitive than specialized programs like the B.Tech. or BS in Economic Sciences at IISER Bhopal.

Different IISERs have varying cut-off ranks. Some, like IISER Pune, are more competitive than others.

The number of seats available in each IISER and program also plays a crucial role.

Read the below article to understand the cutoff trends of IAT for IISER

https://engineering.careers360.com/articles/iiser-merit-list-and-cutoff

Thank you!!