Hello Sakshi
There is no such compulsion of having maths. Even a PCB student can apply for IISER.
But it is considered as an advantage to have maths as a subject as it consists of 25% of the aptitude test in IISER.
The admission in IISER could be taken through 3 channels that is through JEE ADVANCED, through KVPY or through Central and state boards.
As far as state board is concerned, there are minimum cut offs for various categories.
If you fulfill the minimum criteria then you are eligible to take admission in IISER.
Good luck

Dear Aspirant,

Sorry to say but you can't appear for the exam as you have to have maths in you 10+2 and as you don't have maths in your 10+2 then you can't appear for IISER. 

Don't get disheartened as you will get plenty of other options in life.

Good luck

IISER Mohali

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