An organic compound \(A\) with molecular formula \(C_7H_6O\) forms 2,4-DNP derivative and reduces Tollens' reagent. When \(A\) is heated with conc. KOH, it gives sodium benzoate and compound \(B\). The compound \(B\) is
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Aldehyde without alpha hydrogen undergoes Cannizzaro reaction to give alcohol and carboxylate salt.