question: There is a man in jail.  You want to visit him but you must be related to him.  You tell the police officer, "Okay, but you will figure this out. . . "  Here is the riddle:  Brothers and sisters, I have none.   But this man's father Is my Father's son.   Can you figure out how he is related to him?
choices.label: A B C D E
choices.text: company man barman you are his son descendent he is the mans father