$A$ and $B$ are a married couple. $X$ and $Y$ are brothers. $X$ is the brother of $A$. How is $Y$ related to $B$?

If $A \star B$ means $A$ is the father of $B$,$A \times B$ means $A$ is the mother of $B$,and $A \# B$ means $A$ is the husband of $B$,then which of the following means $P$ is the grandson of $Q$?

$X$ introduces $Y$ saying,"He is the husband of the granddaughter of the father of my father." How is $Y$ related to $X$?

$A$ family consists of six members $P, Q, R, X, Y,$ and $Z$. $Q$ is the son of $R$ but $R$ is not the mother of $Q$. $P$ and $R$ are a married couple. $Y$ is the brother of $R$. $X$ is the daughter of $P$. $Z$ is the brother of $P$.
Who is the brother-in-law of $R$?

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?

Pointing to an old man,Kailash said,"His son is my son's uncle." How is the old man related to Kailash?