Pointing to an old woman, Kabir said, “Her only son is the father of my wife.” How is Kabir’s wife related to the old woman?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Granddaughter
The daughter of one’s son is one’s granddaughter.
The old woman’s only son is the father of Kabir’s wife
So Kabir’s wife is the daughter of the old woman’s son: she is the old woman’s granddaughter

Why the other options are incorrect
Option (1) Daughter — Incorrect. Kabir’s wife is the daughter of the old woman’s son, not of the old woman herself.
Option (2) Daughter-in-law — Incorrect. A daughter-in-law is the wife of a son; the old woman’s son is the father of Kabir’s wife.
Option (3) Niece — Incorrect. A niece is the daughter of a brother or sister; the father of Kabir’s wife is the old woman’s son.