David is looking at a photo. His friend asks him, "Who is depicted in this photo?" David answers: "I have got no siblings, but the father of this man is the son of my father." Whose photo is David looking at?

Himself
His uncle
His son
His father

You can hide two incorrect answers

Play Quest&Rest daily if you want to increase your IQ by 10 points! The more you practice the more you learn!