2 basic vulnerabilities in the recovery options were 1. account recovery question 2. 3 trusted friends 1. Account recovery question Now Facebook asks you these questions as security concerns 1.What was the last name of your first grade teacher? you can use this question as very few will know the answer of this question but you.. 2. In what city or town was your mother born? never ever use this question if it's not secret. there is no secret in it.. most of the people who know little about you will find out this question simply by guessing or by visiting your mother's Facebook profile... 3. What street did you live on when you were 8 years old? one of 50-50 questions very few except the one's who played with you on that street or who watched you there will know the answer. 4. What was the last name of your third grade teacher? Same as the first Question now question 4 and 5 I would suggest you not to use.. as this is also vulnerable to