Q: i forg securty qustain pleass help me

You need to ask Apple to reset your security questions; ways of contacting them include clicking here and picking a method for your country, phoning AppleCare and asking for the Account Security team, and filling out and submitting this form.

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Alternatives for Help Resetting Security Questions and Rescue Mail

     1. Apple ID- All about Apple ID security questions.

     2. Rescue email address and how to reset Apple ID security questions

     3. Apple ID- Contacting Apple for help with Apple ID account security.

     4. Fill out and submit this form. Select the topic, Account Security.

     5.  Call Apple Customer Service: Contacting Apple for support in your

          country and ask to speak to Account Security.

How to Manage your Apple ID: Manage My Apple ID

I forget security questions.

See : If you forgot the answers to your Apple ID security questions - Apple Support