Hi aspirant,

during appearing for exam, they generally check your registration number, your full name and compare it with one of you photo id proof, etc. So at that time it will create problem, becuas you entered wrong father's name. However you can do one thing, just try to get helpline contact number and mail id from official website,and tell them your issue and make it correct by providing id prrofs, they might be able to help you.

Hope this is helpful to clear your dilemma.