To determine how B is related to A, let's break down the statement:
- A says, "His mother is the daughter of B's mother."
- This implies that A's mother is B's mother's daughter.
- Therefore, B's mother has two children: B and A's mother.
Now, let's establish the relationships:
- If A's mother is B's sibling, then B is either A's uncle or aunt.
Thus, B is related to A as either an Uncle or an Aunt.