If A is the mother of B. C is the son of A, D is the brother of E, E is the daughter of B. Who is the grandmother of D?

Let's break down the relationships step by step:

1. A is the mother of B.
   • A (mother) → B (child)
2. C is the son of A.
   • A (mother) → C (son)
   • So, B and C are siblings (both children of A).
3. D is the brother of E.
   • D and E are siblings.
4. E is the daughter of B.
   • B (parent) → E (daughter)
   • Since D is E's brother, B is also D's parent.

Now, let's find the grandmother of D:

• D's parent is B.
• B's mother is A.

Therefore, A is the grandmother of D.

Final Answer

A is the grandmother of D.