Blood Relations Questions

Q is the son of R but R is not the mother. So, R is the Father of Q. P is married to R

So, P is the wife of R and the mother of Q, X is the daughter of P and hence of R and so she is the Sister of Q, Y is the brother of R and Z is the brother of P. 

R is the father of Q 

 O @ N # M means O is the father of N who is the sister of M i.e. O is a father of two children.

B is the son of C but C is not the mother of B means C is the father of B A is married to C means A is the mother of B. 

F is brother of B means F is son of A and C. D is daughter of A means D is daughter of A and C

Clearly. from the data available. the wife of E cannot be determined. 

Brother of person's wife → brother-in-law of the person. Hence, the son of lady's brother is brother-in-law of the person.

Therefore, the brother of the lady is the father-in-law of the person. Hence, the lady is the sister of the person's father-in-law.

A is the father of X and Y is the sister of X. So, Y is the daughter of A.

Q's mother is sister of P and daughter of M => P is the child of M.
S is daughter of P and sister of T, so P is parent of T too.
M ----> parent --------> P ------------>parent -------------> T
But given M is brother of R => M is male.

So, M is grandfather of T.