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MCQ (Single Correct Answer)
GATE CSE 2006
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)mod5 = 2 and d(s)mod7 != 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
