Q: How do I reset my security question, if I forgot the answer

You need to ask Apple to reset your security questions; this can be done by clicking here and picking a method, or if your country isn't listed, filling out and submitting this form.

They wouldn't be security questions if they could be bypassed without Apple verifying your identity.

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Forgotten Security Questions / Answers...

See Here > Apple ID: Contacting Apple for help with Apple ID account security

          Ask to speak with the Account Security Team...

Or Email Here  >  Apple  Support  iTunes Store  Contact

More Info >  Apple ID: All about Apple ID security questions

Note:

You can only set up and/or change a Rescue Email Before you forget the questions/answers

Go to the Apple ID Security site from http://support.apple.com/kb/HT5699'or call the AppleCare Support number from http://support.apple.com/kb/HE57 and ask to speak with the Account Security Team.