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The Correct answer would be A) Ambiguous

An ambiguous grammar is one for which there is more than one parse tree for a single sentence. Since each parse tree corresponds to exactly one leftmost (or rightmost) derivation, an ambiguous grammar is one for which there is more than one leftmost (or rightmost) derivation of a given sentence.

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radha gogia asked Oct 2, 2015
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According to me both ER1 and ER2 have a many to one relation from P To Q , so does it imply that P has more no of entities than Q or we can simply say that through an ER ...