The compounds 'A' undergoes Koble's reac...

The compounds 'A' undergoes Koble's reaction in the presence of `CO_(2)` and NaOH to give compound 'B' . Compound 'B' when treated with acetic anhydride in acidic medium , gives acetylsalicylic acid i.e. aspirin. Identify the compound 'A' and 'B'.

Salicyladehyde, Salicylic acid

Phenol, salicylic acid

phenol, salicyladehyde

Phenol , Benzaldehyde

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