An organic compound X (C9H12O) evolves H2 gas with Na metal and does not rotate plane polarised light. It reacts with hot KMnO4 to form Y (C8H6O4) which upon heating undergoes dehydration to yield Z (C8H4O3). Compound X also undergoes dehydration with conc. H2SO4.
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What is the name of the condensation polymer of Y with Ethylene Glycol ?

Determine the structure of compound X.
Theory based