Strictly come dancing: Extreme edition

Ashley, Joe, Stacey, Faye, Pasha and Dianne awake in a room chained to the wall. There are 6 apples on a plate, they must each select one each, but can only grab one when everyone gives slack on their chain. 5 of them are genuine, 1 is poisoned, who survives and who dies, it's how you play the game that will decide...