IQ Teaser #54

In giving a tour of his house, a man points to a picture of a man that is hanging on the wall, and says "that man is my mother's son's father's father's son." If it is known that all of the men in the family of the man who is giving the tour are only sons, what is the relationship of the man in the picture to the man who is pointing at it? The man in the picture is the cousin of the man pointing to the picture uncle of the man pointing to the picture nephew of the man pointing to the picture son of the man pointing to the picture father of the man pointing to the picture brother (deceased) of the man pointing to the picture clone of the man pointing to the picture employer of the man pointing to the picture employee of the man pointing to the picture None of the above view results