A man pointing to a photograph says – “The lady in the photograph is my nephew's maternal grand-mother”. How is the lady in the photograph related to the man's sister, who has no other sister ? She is

Pointing to a photograph of a girl, Rajan said, 'She has no sister or daughter but her mother is the only daughter of my mother.' How is the girl in the photograph related to Rajan's mother?

Pointing to a man in a photograph, a woman said, "His brother's father is the only son of my grandfather." How is the woman related to the man?

Pointing to a man, a lady said 'His mother is the only daughter of my mother'. How is the lady related to the man?

Pointing to a photograph, A said to his friend B: 'She is the only daughter of the father of my mother.' How is A related to the person in the photograph?

Introducing a man, a woman said, "His sister's mother has only one son who is the husband of my father's only daughter." How is the woman related to the man?