A) X and Y are resonance structures and Z is a tautomer
B) X and Y are tautomers and Z is a resonance structures
C) X, Y and Z are all resonance structure
D) X, Y and Z are all tautomers
Correct Answer: A
Solution :
In resonating structure, there is movement of lone pair-lone pair and \[\text{ }\!\!\pi\!\!\text{ -}\]electrons only but in tautomerism, there is movement of 'H' atom, So, X and Y are resonating structures and Z is tautomer.
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