Let L be a language and \(\vec L\) be its complement. Which one of the following is NOT a viable possibility?

Both L and \(\vec L\) are recursive.

Neither L nor \(\vec L\) is recursively enumerable (r.e.).

One of L and \(\vec L\) is r.e. but not recursive; the other is not r.e.

Both L and \(\vec L\) are r.e. but not recursive.

Let L be a language and \(\vec L\) be its complement. Which one of th

1.	Let L be a language and \(\vec L\) be its complement. Which one of the following is NOT a viable possibility?
A.	Neither L nor \(\vec L\) is recursively enumerable (r.e.).
B.	One of L and \(\vec L\) is r.e. but not recursive; the other is not r.e.
C.	Both L and \(\vec L\) are r.e. but not recursive.
D.	Both L and \(\vec L\) are recursive.
Answer» D. Both L and \(\vec L\) are recursive.

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Let L be a language and \(\vec L\) be its complement. Which one of the following is NOT a viable possibility?

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