sir can i expect an iiser admission with 4000 overall rank
It is tough to get any iiser at 4000 rank because the cutoff of iiser tirupati which is comparatively less preferred was about 3500 for bs program and 3200 for bsms program so on that basis itis tough to get admission but yes if you have a decent jee advance rank or kvpy rank then you can apply on basis of that as well