Hi aspirant,

You have not mentioned the name of any examination so I can not elaborate much about it. But if you have registered for any state level examination then it's absolutely ok even if you have submitted the state obc certificate. In case it's an national level examination you can carry an affidavit during the document verification claiming that you have the central OBC certificate and you have mistakenly mentioned the state OBC certificate. You need not to worry as in both the cases there would be absolutely no problems.

Hope it helps!!