If Kamal says, "Ravi`s mother is the only daughter of my mother", how is Kamal related to Ravi ?

A. Grandfather
B. Father
C. Brother
D. Cannot be determined
E. None of these
Answer: A . None of these

Justification: Only daughter of Kamal's mother -- Kamal's sister.
So, Ravi's mother is Kamal's sister or Kamal is the brother of Ravi's mother i.e., Ravi's maternal uncle.