Q3-viii

MSQMarks unknown

Let $R_{1}$ and $R_{2}$ be regular sets defined over the alphabet $\Sigma$ Then:

(A)

$R_{1} \cap R_{2}$ is not regular.

(B)

$R_{1} \cup R_{2}$ is regular.

(C)

$\Sigma^{*}-R_{1}$ is regular.

(D)

$R_{1}^{*}$ is not regular.

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