Pointing to a person, Raju said, “He is the only brother of my father’s mother’s daughter.” How is the person related to Raju?

To solve this, let's break down the relationships:

1. "My father's mother" - This is Raju's grandmother.
2. "My father's mother's daughter" - This is the daughter of Raju's grandmother, which could either be Raju's father's sister (Raju's aunt) or Raju's father himself.
3. "The only brother of my father's mother's daughter" - This is the only brother of either Raju's aunt or Raju's father. If it's the brother of Raju's aunt, it would be Raju's father. If it's the brother of Raju's father, it would be Raju's uncle.

However, since the statement says "only brother", and we know that Raju's father cannot be his own brother, the person Raju is pointing to must be Raju's father.