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Which of the following are grammars is/are ambiguous? 3 xS| Sx S (I II) S XX, X aX, X - b a) I only

Which of the following are grammars is/are ambiguous? 3 xS| Sx S (I II) S XX, X aX, X - b a) I only b) II only c) Both I and II d) Neither I nor II

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