How to Hacking Facebook with security Question Vulnerability?

You can bypass the security question and hack the friend's face book account with 2 mutual Friends.

Facebook Feature(drawback)?
 Facebook provides option to recover your account with security question.  But if you forget the answer , still you can recover with your 3 friends account.


How the Hackers hacking the facebook accounts? if they are not your friends, they may request with 3 fake