Pointing to a woman,Nirmal said,"She is the daughter of my wife's grandfather's only child". How is the woman related to Nirmal?

Pointing to a photograph,a woman says,"This man's son's sister is my mother-in-law." How is the woman's husband related to the man in the photograph?

$D$ is $A's$ son. $C$ is the mother of $P$ and wife of $D$. How is $A$ related to $C$?

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 $F - R + H \div T,$ how is $F$ related to $T?$

$R$ is the daughter of $Q$. $M$ is the sister of $B$,who is the son of $Q$. How is $M$ related to $R$?

If $A+B$ means $A$ is the mother of $B$,$A \div B$ means $A$ is the brother of $B$,$A \times B$ means $A$ is the son of $B$,and $A-B$ means $A$ is the daughter of $B$,which of the following means $C$ is the niece of $D$?