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Find the intersection of each pair of the following set : $A=\{1,2,3\},B=\phi$

$\begin{array}{1 1}(A)\;\{1,2,3\}&(B)\;\{3\}\\(C)\;\{1,2,3,\phi\}&(D)\;\phi\end{array}$

Can you answer this question?

$A=\{1,2,3\}$
$B=\phi$
$A\cap B=\{1,2,3\}\cap \phi$
$\Rightarrow \phi$
Hence (D) is the correct answer.
answered May 27, 2014