P is the brother of Q and R. S is R's mother. T is P's father. Which of the following statements cannot be definitely true ? 

A man introduces a lady as the daughter of the daughter of the father of his uncle. His uncle has only one sibling. The lady is the man's __.

Looking at a portrait, Advaita said, " Anirudh is the father of my grandmother's daughter's niece. My grandfather had only two kids". How is Anirudh related to Advaita?

Amit and Ritu are a couple. Mrinal and Shonal are brothers. Mrinal is the brother of Ritu. How is shonal related to Amit?

Ms. X's husband is the only son of Ms. Y's mother. If Ms. X's brother and Ms. Y's husband are cousins, then Ms. X is Ms. Y's ____.

Pointing to a boy in a photograph, Neena said, "He is the son of my grandmother's only daughter". How is Neena related to the boy?

A girl introduces a man as the son of her grandfather and the brother of her maternal aunt. How is the man related to the girl?

Rampal told Arjun, "Yesterday I defeated the only brother of the daughter of my grandmother." Whom did Rampal defeat?

Pointing to a man in a photograph, Gunjan said, " His mother's only daughter is my mother." How is Ganjan related to that man?