Since you have been originally domiciled in Jharkhand you are entitled to any certificate from the state of Jharkhan only.
Now of your father is OBC and does not belong to creamy layer then you are entitled to OBC certificate.
I am not sure what doyou man by Khatian.
If the competent authority refuses to issue OBC certificate for reasons which is supported by law then you can filewrit petition in high court for necessary relief.