Looking at a portrait of a man,Harsh said,"His mother is the wife of my father's son. Brothers and sisters $I$ have none." At whose portrait was Harsh looking?

$A$ family consists of six members $P, Q, R, S, T$ and $U$. There are two married couples. $Q$ is a doctor and the father of $T$. $U$ is the grandfather of $R$ and is a contractor. $S$ is the grandmother of $T$ and is a housewife. There is one doctor,one contractor,one nurse,one housewife,and two students in the family.
Which of the following is definitely a group of male members?

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?

Pointing to a lady,a man said,'The son of her only brother is the brother of my wife'. How is the lady related to the man?

If $A + B$ means $A$ is the son of $B$,$A - B$ means $A$ is the husband of $B$,and $A \times B$ means $A$ is the sister of $B$,then which of the following shows the relation $Q$ is the maternal uncle of $P$?

Pointing to a lady,a man said,"The son of her only brother is the brother of my wife." How is the lady related to the man?