Facebook Account blocked by Facebook

Hello,

Dear sir

My Facebook account is blocked for no reason and Facebook never gave me warning on anything I had done . And FB asked me to verify on friends name some who I didn't know . So I tried the verify and the test failed . So my account got blocked . Then I used my friend's account to look for mine which I got blocked and just couldn't find my account anymore . My account got suspended ? Blocked ? Drew out from FB ? May I know what is the reason?