Given that:
$1.$ $A$ is the mother of $B$;
$2.$ $C$ is the son of $A$;
$3.$ $D$ is the brother of $E$;
$4.$ $E$ is the daughter of $B$.
The grandmother of $D$ is:

$A$ 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?

If $P \times Q$ means $P$ is wife of $Q$,$P + Q$ means $P$ is father of $Q$,and $P \div Q$ means $P$ is sister of $Q$,then in $G \times H + R \div D$,how is $G$ related to $D$?

$A$ is the father of $C$. But $C$ is not his son.
$E$ is the daughter of $C$. $F$ is the spouse of $A$.
$B$ is the brother of $C$. $D$ is the son of $B$.
$G$ is the spouse of $B$. $H$ is the father of $G$.
Who is the son of $F$?

There is a family of six persons $A, B, C, D, E,$ and $F$. They are lawyer,doctor,teacher,salesman,engineer,and accountant. There are two married couples in the family. $D$,the salesman,is married to the lady teacher. The doctor is married to the lawyer. $F$,the accountant,is the son of $B$ and brother of $E$. $C$,the lawyer,is the daughter-in-law of $A$. $E$ is the unmarried engineer. $A$ is the grandmother of $F$. What is the profession of $A$?

Deepak is the brother of Ravi. Rekha is the sister of Atul. Ravi is the son of Rekha. How is Deepak related to Rekha?