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GATE | GATE CS 2008 | Question 12

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If L and L’ are recursively enumerable, then L is
(A) regular
(B) context-free

(C) context-sensitive
(D) recursive

Answer: (D)

Explanation: If L is recursively enumerable, then L’ is recursively enumerable if and only if L is also recursive.

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Last Updated : 28 Jun, 2021
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