Pointing puzzle: Determine the woman’s relation to Abhijit. Abhijit says: “Her granddaughter is the only daughter of my brother.” How is the woman related to Abhijit?

Reasoning The “only daughter of my brother” is Abhijit’s niece. That niece is the woman’s granddaughter ⇒ the woman is the mother of Abhijit’s brother (and therefore Abhijit as well).

Conclusion The woman is Abhijit’s Mother.