Pointing to a lady,a man said,"The son of her only brother is the brother of my wife." How is the lady related to the man?

If $P + Q$ means $P$ is the husband of $Q$,$P - Q$ means $P$ is the sister of $Q$,and $P \times Q$ means $P$ is the son of $Q$,which of the following shows $A$ is the daughter of $B$?

$A$ is the son of $B$; $C$,$B$'s sister,has a son $D$ and a daughter $E$; $F$ is the maternal uncle of $D$. How is $E$ related to $F$?

These questions are based on the following information. Study it carefully and answer the questions.
$(i)$ $A \times B$ means $A$ is father of $B$.
$(ii)$ $A \div B$ means $A$ is daughter of $B$.
$(iii)$ $A + B$ means $A$ is sister of $B$.
$(iv)$ $A - B$ means $A$ is husband of $B$.
In $G \times T + Q \div M$,how is $M$ related to $G$?

Pointing to a lady,a man said,'The son of her only brother is the brother of my wife'. How is the lady related to the man?

Following questions are based on the information provided below:
$A \times B$ means $A$ is mother of $B$.
$A - B$ means $A$ is brother of $B$.
$A + B$ means $A$ is sister of $B$.
$A \div B$ means $A$ is father of $B$.
Which of the following means $F$ is paternal grandfather of $H$?