If ‘P = Q’ means ‘Q is the father of P’; ‘P * Q’ means ‘P is the sister of Q’; ‘P ? Q’ means ‘Q is the mother of P’; ‘P $ Q’ means ‘P is the brother of Q’; ‘P @ Q’ means ‘Q is the son of P’; and ‘P x Q’ means ‘P is the daughter of Q’. Then which of the following is not correct ?
a)
L $ M * O means O is the sister of L.
b)
M * O @ P = Q means Q and O are husband and wife.
c)
R x S ? T means R is the granddaughter of T.
d)
P = Q ? R means R is the grandmother of P.
Correct answer is option 'A'. Can you explain this answer?