Hello Priyansh,

I dontd think so that there are any extra marks provided to National Players in JEE Mains. But insted of extra marks, you may be eligible for sporta quota if applicable in your preferred institue. 

Now about you admission, please provide more information, I am not sure about what JAC is? In addition please provide you category and preferred branch for engineering. 

Hope this helps, Thank you

All the best