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MCQ (Single Correct Answer)
GATE CSE 2014 Set 2
Let A ≤m B denotes that language A is mapping reducible (also known as many-to-one reducible) to language B. Which one of the following is FALSE?(A) If A ≤m B and B is recursive then A is recursive.(B) If A ≤m B and A is undecidable then B is undecidable.(C) If A ≤m B and B is recursively enumerable then A is recursively enumerable.(D) If A ≤m B and B is not recursively enumerable then A is not recursively enumerable.
