Hello,

IISER's are the premiere group of research institute in our country.The preference order is as follows

• 1 IISER PUNE
  2 IISER KOLKATA
  3 IISER MOHALI
  4 IISER THIRUVANANTHAPURAM
  5 IISER BHOPAL
• 6 IISER BERHAMPUR

The admission is through KVPY and Jee advanced score. Also a screening test is also conducted by iiser separately.

IISER pune is best option as it is the best IISER. It is huge when compared to other institute.There are lots of pros for all these institute. You will be safe inside the campus as it is isolated amidst  peaceful  natural environment.IISER's are kind of IIT's for science students. IT will make you equipped with research oriented skills, science development etc.Also they have good placement rates.

As a negative side, one have to pursue higher studies as it is a research oriented field.But they provide you a great exposure to the world and the reputation in international domain is really high.

You can go through the link if needed.

https://engineering.careers360.com/articles/iiser-admission

Prepare well.

All the best!!