Pls Help!!!

So I got 55/1/2 physics set Delhi area which is toughest as far I know through internet And I am getting 22 in theory part and expecting 28 in practical which make 50 in total And BITSAT dena tha which needs 60 marks in each PCM So I wanna know Can I cover this 10 marks gap through Grace marks If No so what can I do further pls Help me It's matter of my life rn 😿 I hear something NIOS board what is that