If Jaya's mother is Vibha's mother's daughter, then how is Vibha's mother related to Jaya?

Correct option is C

Ans. (c)
Sol. Let’s break this down: " Jaya's mother is Vibha's mother's daughter"
Now, Vibha's mother's daughter can either be Vibha herself or Vibha's sister.
So if Jaya's mother = Vibha's mother's daughter, then Jaya's mother is Vibha herself (if Vibha is that daughter) or Vibha's sister.
In either case, Jaya is the daughter of Vibha.
Hence, Vibha is Jaya’s grandmother’s daughter, i.e., Jaya’s mother is Vibha, so Vibha's mother is Jaya's grandmother.
Thus, Vibha's mother is Jaya's grandmother.