Hello,

Grace marks is given in an exam when the question paper is extraordinarily tough.

When grace marking is given it will help those students who were in the position that they just pass or qualify the exam.

Sometimes it will help each and every student when question is wrong.

Hope this will help you.

There are relaxation in the cut-off for PWD candidates and seats are reserved for PWD candidates. For further details you can take help from the below mentioned link:-

https://engineering.careers360.com/articles/jee-main-reservation-criteria

Good Luck