Which of the following languages is regular?

1.	Which of the following languages is regular?
A.	{WW^R \| W € {0,1}+ }
B.	{WW^R X \| X W € {0,1}+ }
C.	{WW^R \| X W € {0,1}+ }
D.	{XWW^R \| X W € {0,1}+ }
Answer» D. {XWW^R \| X W € {0,1}+ }

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Which of the following languages is regular?

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