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Which of the following statements are correct for a concept called inherent ambiguity in CFL?

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Which of the following statements are correct for a concept called inherent ambiguity in CFL?

(a) Every CFG for L is ambiguous

(b) Every CFG for L is unambiguous

(c) Every CFG is also regular

(d) None of the mentioned

I had been asked this question in examination.

This question is from The Language of a Grammar, Inferences and Ambiguity in division Context Free Grammars and Languages of Automata Theory

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Right answer is (a) Every CFG for L is ambiguous

Best explanation: A CFL L is said to be inherently ambiguous if every CFG for L is ambiguous.

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