Hello Aspirant,

The Candidates are admitted to IISER only through following three channels.

Kishore Vaigyanik Protsahan Yojana (KVPY) channel

Joint Entrance Examination (JEE-Advanced) of the Indian Institutes of Technology

State and Central Boards Channel (SCB)

You can also check Category-wise cut-off marks (out of 500) for class 10+2 examination for different State and Central Boards with the given below link.

https://www.iiseradmission.in/eligibility/

Good Luck!