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.
How is $B$ related to $F$?
- Sister
- Grandmother
- Wife
- Data inadequate