If A = {1, 2, 3, 6, 11,18, 21}, B = {5, 7, 9} and N is the universal set, then A’ U ((AU B) ? B’) is equal to

If A = {1, 2, 3, 6, 11,18, 21}, B = {5, 7, 9} and N is the universa

1.	If A = {1, 2, 3, 6, 11,18, 21}, B = {5, 7, 9} and N is the universal set, then A’ U ((AU B) ? B’) is equal to
A.	A
B.	B
C.	N
D.	N-A
Answer» D. N-A

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