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If A={l,4, 7,8}, B={4,6,8,9} and C={3,4,...

If `A={l,4, 7,8}, B={4,6,8,9} and C={3,4,5, 7}` be three subsets of a universal set `U ={1,2, 3, 4,5, 6, 7,8, 9}`. Then, `A uu (Bnn C')` is equal to

A

{1, 6, 7, 8, 9}

B

{1, 6, 7, 8, 9, 3}

C

{1, 4, 6, 7, 8, 9}

D

None of these

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The correct Answer is:
C
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If A = {1, 4, 7, 8},B = {4, 6, 8, 9} andC = {3, 4, 5, 7} be three subsets of a universal set U = { 1, 2, 3, 4, 5 , 6 , 7 , 8 , 9 } . Then, A cup ( B cap C ' ) is equal to

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