A bit of extra caution -- most security questions do not require a correct answer. All that is necessary is to answer the question using the answer that was originally given, so never use a correct answer, e.g.:
Q: Name of your oldest child?
A: Lassie
Q: In what city were you born?
A: Bespin
Unless it's required, never use a correct answer to the question.
However, in the USA, some government sites check the answer against official information, so a correct answer is required.
