What can I say to my younger sister to ease her tension for she has her JEE exam tomorrow.

I want her to be carefree about the result and do what she can without thinking of the future. I know thinking of future is important but not in the moment. She has worked really hard in the last 3 years. She is amazing. But I am afraid she will beat herself if she doesn't score good. Especially our Nani will be taunting. So it can be a problem. But dad, mom and everyone else will always support her. Whithout the blame. She also has her second attempt in April. So that should ease her tension right?