$X - Z$ means $X$ is the mother of $Z$; $X \times Z$ means $X$ is the father of $Z$; and $X + Z$ means $X$ is the daughter of $Z$. If $M - N \times T + Q$,then which of the following is not true?

$A \div B$ 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 $P \times R \div Q$,which of the following statements is true?

If Kamal says,"Ravi's mother is the only daughter of my mother," how is Kamal related to Ravi?

Study the following information carefully to answer these questions.
$(i)$ $P \times Q$ means $P$ is brother of $Q$
$(ii)$ $P - Q$ means $P$ is sister of $Q$
$(iii)$ $P + Q$ means $P$ is mother of $Q$
$(iv)$ $P \div Q$ means $P$ is father of $Q$
Which of the following means $K$ is maternal uncle of $W$?

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

$A$ and $B$ both are children of $C$. If $C$ is the mother of $A$,$A$ is the son of $C$ but $B$ is not the daughter of $C$,how are $A$ and $B$ mutually related?