Hello friend!

1) Please check all the potential places where you lost. There are chances that it might have been displaced.

2) If you have a photocopy of the ID, it would do the job too. Please remember to get a photocopy of important documents and things like this from now on.

3) I would suggest you to contact the MU examination query department to find any alternate way.

Please do not panic. Try your best. I wish you a good luck.