Showing a lady in the park,Ashok said,'She is the daughter of my grandfather's only son'. How is Ashok related to that lady?

Given that $A + B$ 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 $B$,and $A \div B$ means $A$ is the daughter of $B$. If $P \div R + Q$,which of the following is true?

$I.$ $A, B, C, D, E$ and $F$ are six members of a family.
$II.$ One couple has parents and their children in the family.
$III.$ $A$ is the son of $C$ and $E$ is the daughter of $A$.
$IV.$ $D$ is the daughter of $F$ who is the mother of $E$.
Which of the following pairs are the parents of the children?

If $A + B$ means $A$ is the brother of $B$; $A \cdot B$ means $A$ is the father of $B$ and $A \times B$ means $A$ is the sister of $B$,which of the following means $M$ is the uncle of $P$?

Pointing to a photograph,a man tells his friend,"She is the daughter of the only son of my father's wife." How is the girl in the photograph related to the man?

Pointing to a person,a man said to a woman,"His mother is the only daughter of your father." How was the woman related to the person?