Read the following information carefully and then answer the question given below it.
$\text{A, B, C, D, E and F}$ are six members of a family.
There are two married couples among them.
$C$ is the mother of $A$ and $F$.
$E$ is the father of $D$.
A is the grandson of $B$.
The total number of female members in the family is three.
Which of the following pairs is one of the married couples?
- $E-F$
- $B-D$
- $E-B$
- $A-F$