Hello,

Admit card has all the details like school code, center code, roll number (most important) and other details that are required to see your result. So one can cannot afford to loose it. But if you loose it, don't need to panic because you can check your result by following ways also:

1. You can ask all details from your friends like school code and center code.
2. You can ask your school to provide you admit card. Usually schools keep a copy of admit card with them fro emergency cases.
3. You can even generate admit card online on CBSE website. The duplicate admit card can be obtained by entering your affiliation code as user-id and school code as password.

But one should always be responsible and loosing such important documents can lead you in many difficult situations. Be careful.

Hope it helps.

All The Best!