CBSE - Blood Relation

Introducing a man a woman said, “he is the only son of my mother’s mother”. How is the woman related to the man? (1) Mother (2) Aunt (3) Sister (4) Niece

If A is the brother of B and K, D is the the mother of B and E is the father of A. Which one of the following statement is not definitely true ? (1) B is the brother of K (2) A is the father of K (3) A is the son of D (4) D is the wife of E

Pointing to a lady on the platform Geetha said, “she is the sister of the father of my mother’s son”. What is the lady to Geetha? (1) Mother (2) Sister (3) Aunt (4) Niece (5) None of these