If (A) P + Q means P is the brother of Q ;
(B) P x Q means P is the father of Q ;
(C) P - Q means P is the sister of Q ;
which of the following represents S is the niece of T ?
X - Z means X is the mother of Z ;
X x Z means X is the father of Z and
X + Z means X is the daughter of Z.
Now, if M - N x T + Q, than which of the following is not true ?
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 ?