Deducing the Married Couples

We can identify the two married couples by analyzing the relationships described in the clues.

Identifying the First Couple (Parents' Generation)

The clue "C is wife of B" directly and explicitly states that B and C are married. This establishes the first couple.

• Couple 1: (B, C)

Identifying the Second Couple (Grandparents' Generation)

1. The clue "D is the grandmother of A and mother of B" establishes D as the mother of B.
2. The clue "F is the granddaughter of E" establishes E as a grandparent. Since F is the child of B and C, F's grandparents are the parents of B.
3. We already know D is B's mother, making her F's grandmother. Therefore, E must be the other grandparent on that side of the family, making E the husband of D.

This tells us the second couple is (D, E).

Conclusion

The two married couples in the family are (B, C) and (D, E). Looking at the options provided, the pair DE is listed.