Hello Ekta!!
Since you have mentioned you have PCB, you won't be able to do graduation in Physics. You need to study maths in your +2 to be eligible for graduation in Physics. You can either study maths as an additional subject now or give maths exam from an open board. Maths is must for Physics (H). You won't be eligible for KVPY as well, you need to have maths as a subject to be eligible for KVPY.
I hope this helps you! If not feel free to ask in comments.

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