A recursively ennumerable language L can be recursive if:(a) L’ is recursively ennumerable(b) Every possible sequence of moves of T, the TM which accept L, causes it to halt(c) Both (a) and (b)(d) None of the mentionedI got this question during an online exam.I need to ask this question from The Language of Turing Machine-2 topic in chapter Introduction to Turing Machines of Automata Theory

A recursively ennumerable language L can be recursive if:(a) L’ is r

1.	A recursively ennumerable language L can be recursive if:(a) L’ is recursively ennumerable(b) Every possible sequence of moves of T, the TM which accept L, causes it to halt(c) Both (a) and (b)(d) None of the mentionedI got this question during an online exam.I need to ask this question from The Language of Turing Machine-2 topic in chapter Introduction to Turing Machines of Automata Theory
Answer» CORRECT choice is (c) Both (a) and (b) Explanation: Theorem- If L is a RECURSIVELY ennumerable LANGUAGE whose complement is recursively ennumerable, then L is recursive.

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