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ISRO | ISRO CS 2015 | Question 43
Let R1 and R2 be regular sets defined over the alphabet, then
(A)
R1 ∩ R2 is not regular
(B)
R1 ∪ R2is not regular
(C)
Σ * - R1 is regular
(D)
R1 * is not regular
Answer
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