For S € (0+1)* Let D(s)denote the Decimal Value of S(e.g.d(101)=

question 10

Multiple Choice

For S € (0+1) * let d(s) denote the decimal value of s(e.g.d(101) = 5) .Let L = {s € (0 + 1) | d (s) mod 5 = 2 and d (s) mod 7 != 4) }Which one of the following statements is true?

• A)L is recursively enumerable, but not recursive
• B)L is recursive, but not context-free
• C)L is context-free, but not regular
• D)L is regular

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