If \( \mathrm{A} \) and \( \mathrm{B} \) be any two sets, then \( (...

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If \( \mathrm{A} \) and \( \mathrm{B} \) be any two sets, then \( (\mathrm{A} \cap \mathrm{B}) \) ' is equal to-
(A) \( \mathrm{A}^{\prime} \cap \mathrm{B}^{\prime} \)
(B) \( \mathrm{A}^{\prime} \cup \mathrm{B}^{\prime} \)
(C) \( A \cap B \)
(D) \( \mathrm{A} \cup \mathrm{B} \)
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