Let X= {1,2,3}, Y= {}, Z= {1,2,3}, then which of the following is true

1.	Let X= {1,2,3}, Y= {}, Z= {1,2,3}, then which of the following is true?
A.	X Y
B.	Only Y X and Y Z
C.	Z Y
D.	Y X and Y Z and X Z
Answer» E.

Discussion