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

A. BROTHER-IN-LAW

All the six members of a family A, B, C, D, E and F are travelling together. B is the son of C but C is not the mother of B, A and C are a married couple. E is the brother of C. D is the daughter of A. F is the brother of B. How many male members are there in the family ?

D. 4

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 ÷ Q, which of the following is true ?

C. P IS THE HUSBAND 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

(i) In a family of six persons A, B, C, D, E and F, there are two married couples.
(ii) D is grandmother of A and mother of B.
(iii) C is wife of B and mother of F.
(iv) F is the grand daughter of E.

What is C to A ?

C. MOTHER