Riddle: You are talking a walk when a mad scientist kidnapps you and locks you in her basement. She tells you, "there are 5 keys in the basement. You have one chance to pick a key. If it is the key that unlocks the door, I will set you free. If it the wrong key, you will be locked in my basement forever. Each key has a note attached to it. Two notes tell the truth and three notes lie." Red: The blue key or green key unlocks the door Blue: The pink key unlocks the door Green: This key does not unlock the door Purple: The scientist lied! All keys unlock the door Pink: This key unlocks the door Which key unlocks the door?