Let \( A \) and \( B \) be two sets. Then \( (A \cup B)^{\prime} \c...

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Let \( A \) and \( B \) be two sets. Then \( (A \cup B)^{\prime} \cup\left(A^{\prime} \cap B\right) \) is equal to
(a) \( A^{\prime} \)
(b) \( \mathrm{A} \)
(c) B'
(d) none of these
\( \mathrm{P} \)
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