Blood relation questions for competitive exams Mother’s or father’s son = Brother Mother’s or father’s daughter = Sister Mother’s or father’s sister = Aunt Mother’s or father’s brother = Uncle Mother’s or father’s father = Grandfather Mother’s or father’s mother = Grandmother Son’s wife = Daughter-in-Law Daughter’s husband = Son-in-Law Husband’s or wife’s sister = Sister-in-Law Husband’s or wife’s brother = Brother-in-Law Brother’s or sister's son = Nephew Brother’s or sister's daughter = Niece Uncle or aunt’s son or daughter = Cousin Sister’s husband = Brother-in-Law Brother’s wife = Sister-in-Law Grandson’s or Grand daughter’s daughter = Great grand daughter Only son/daughter of your father/mother=you/yourself Only son of grand father/grand mother=Father Only daughter of grand father/grand mother=Mother Son of only son/daughter=Grand son Daughter of only son/daughter=Grand Daughter Blood relation test can be classified into three categories Int...