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GATE | Gate IT 2005 | Question 4
Let L be a regular language and M be a context-free language, both over the alphabet Σ. Let Lc and Mc denote the complements of L and M respectively. Which of the following statements about the language Lc∪ Mc is TRUE
(A)
It is necessarily regular but not necessarily context-free
(B)
It is necessarily context-free.
(C)
It is necessarily non-regular.
(D)
None of the above
Answer
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