Hello aspirant

hope you are doing well and safe. With reference to your query,  I would glad inform you that your case is something serious , if you have alloted seat in general category then nothing can be happened but if you havent alloted seat then you should mail to the concerned authorities regarding your mistake which you have done and atttach the proof of obc and hope for the best .Their are chances they will provide you some alternative

Hope you found this answer informative. Best wishes for your future