$E$ is the son of $A$. $D$ is the son of $B$. $E$ is married to $C$. $C$ is the daughter of $B$. How is $D$ related to $E$?

Rahul's mother is the only daughter of Monika's father. How is Monika's husband related to Rahul?

Deepika tells Shraddha,"Your mother's father's son is the husband of my sister." How is Deepika related to Shraddha?

$A \div B$ means $A$ is the father of $B$,$A - B$ means $A$ is the wife of $B$,$A \times B$ means $A$ is the brother of $B$,$A + B$ means $A$ is the daughter of $B$. If $P \times R - Q$,which of the following is true?

Introducing a man to her husband,a woman said,"His brother's father is the only son of my grandfather." How is the woman related to this man?

$A$ is the father of $C$. But $C$ is not his son. $E$ is the daughter of $C$. $F$ is the spouse of $A$. $B$ is the brother of $C$. $D$ is the son of $B$. $G$ is the spouse of $B$. $H$ is the father of $G$. Who is the grandmother of $D$?