For given reaction sequence-Phenol CO 2- NaOH A H - B Ac 2 O - H - C C is-

For given reaction sequence:
$Phenol C O_{2} - --- \to N a O H (A) H^{+} - - \to (B) A c_{2} O - -- \to H^{+} (C)$

(C) is:

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