Given that 1. A is the mother of B; 2. C is the son of A; 3. D is the brother of E; 4. E is the daughter of B. The grandmother of D is
Answer: A. A
D is the brother of E and E is the daughter of B. This means that D is the son of B. Also, A is the mother of B. So, A is the grandmother of D. Hence, the answer is (a).