you are a prisoner serving 11yrs for securities fraud

the officer who caught you gives you an opportunity to escape from the prison ,coz he thinks ur intelligent coz of your highly successful ponzi schemes

he asks you a riddle ..if you solve it you go free

he takes you to a room with 2 doors

one door is a way out of prison (you dont know which door)
other is for execution chamber ((you dont know which door)

there are also 2 robots in that room
1 robot always answer true facts (you dont know which robot)
other robot always answer false(you dont know which robot)

you can ask only 1 question to any robot

your objective is to find the door to outside