You come across a man sitting on the shore of a sea. That man is holding a picture in his hands and crying. Concerned, you decide to go and talk with him.
Reaching him, you ask him, “Whose picture are you holding?”
He then looks at you and then turn back towards the picture muttering, “Brothers and sisters have I none, but that man’s father is my father’s son.”
Can you find out the person in the picture?
Since I have no brothers of sisters I am an only child; hence ‘my father’s son’ is ME. Therefore ‘that man’ is MY son.
Thus the person in the picture is that man’s son.