A family consists of six members P, Q, R, X, Y and Z. Q is the son of R but R is not mother of Q. P and R are a married couple. Y is the brother of R. X is the daughter of P. Z is the brother of P. How many children does P have ?

Question

$(A) 1 \\(B)\; 2 \\(C)\; 3 \\(D)\; 4$