Hello Aspirant,

If you have lost your admit card of class 10th board examination then you should contact your school authorities because they generally use to have some copies of admit card of every candidate, so that if any candidate loose his/her admit card he would not be disqualified from the examination. So ask from your school authorities they would provide you the copy of admit card if they have otherwise they would arrange it through some process.

I hope this information helps you.

Good Luck!!