Introducing a girl to his girlfriend, Ajay said," Her only brother's mother is the only child of my grandmother." How is Ajay related to this girl?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Brother
The sentence is read from the end, one relation at a time:
“The only child of my grandmother” — Ajay’s grandmother has just one child, so that child must be Ajay’s own parent.
“Her only brother’s mother” — the mother of the girl’s brother is the girl’s own mother.
The two are the same person, so the girl’s mother is Ajay’s parent; being a mother, she is Ajay’s mother.
Ajay and the girl have the same mother, and Ajay is male (“his girlfriend”), so he is her brother — in fact the “only brother” he speaks of is Ajay himself.
