Pointing to a man, a woman said, "His mother is the only daughter of my mother."
How is the woman related to the man ?

A. MOTHER

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 ?

D. SISTER OF FATHER-IN-LAW

A + B means A is the son of B;
A - B means A is the wife of B;
A x B means A is the brother of B;
A ÷ B means A is the mother of B; and
A = B means A is the sister of B.
What does P x R ÷ Q mean ?

C. P IS THE UNCLE OF Q.

A + B means A is the father of B ;
A - B means A is the wife of B ;
A x B means A is the brother of B ;
A ÷ B means A is the daughter of B.

If P - R x Q, which of the following is true ?

C. P IS THE SISTER-IN-LAW OF Q

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 grandfather of R and is a contractor. S is 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 are two married couples ?

B. US, QP