P introduces K saying, ‘He is the husband of the granddaughter of the father of my father.’ How is K related to P?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Brother-in-law
P’s description is read backwards, starting from “my father”, one relation at a time.
“The father of my father” is P’s grandfather
“The granddaughter of” P’s grandfather is a daughter of one of his children; taking the closest such relation, she is the daughter of P’s father, that is, P’s sister
“He is the husband of” P’s sister, so K is P’s brother-in-law
The question does not say whether P is a man or a woman, but the answer does not depend on it: a sister’s husband is a brother-in-law to both.