a good riddle

Okayy here is a riddle for you post what you think the answer is and i post i t up laterr...
Okay your locked in a room with two doors
One door leads to your death
And the other door leads to the outside.
You dont know which door is which
Inside the room with you are two trolls. One always tell lies.
And the other one always tells the truth. You dont know which one is which.
I can ask one a question.
Not a question each just ask one of them a question that will help you get out. What question do you ask???

Remember only one question!!!
post what you think the answer is!!! Holla back atch girl it toookk my 4 evvvvvvvveeeeeerrr to get this one!!