A person dies and is about to enter Hell but then God is so kind that gave him an option. There are 2 doors one leads to Hell and the other to heaven. There are 2 guards sitting next each door and one of them always tells lie and the other always tells the truth. God gave the option to man to ask only one question and decide which is the Heavens door and if he can get in he will remain in Heaven for ever. So now the question is what did the person asked to the guards ?