Who among the following is one of the couples ?
Explanation
Given,
In the family of six-person A, B, C, D, E and F, there are two married couples.
Preparing the family tree using the following symbols,

1) D is the grandmother of A and mother of B.

2) C is the wife of B and mother of F.

3) F is the granddaughter of E.

Hence, 'DE' is the correct answer.
Explanation
Given,
In the family of six-person A, B, C, D, E and F, there are two married couples.
Preparing the family tree using the following symbols,

1) D is the grandmother of A and mother of B.

2) C is the wife of B and mother of F.

3) F is the granddaughter of E.

Hence, 'DE' is the correct answer.