An ester `A(C_4 H_8 O_2)`, on treatement with excess of methyl magnesium bormide followed by acidification, gives an alcohol `B` as the sole organic product. Alcohol `B` on oxidation with `NaOCl` followed by acidification gives acetice acid. Deduce the structures of `A` and `B`. Show the reactions involved.

An ester 'A' (C_(4)H_(8)O_(2)) on treatment with excess methyl magnesium chloride followed on acidification gives an alcohol 'B' as the sole organic product. Alochol 'B' as the organic product. Alcohol 'B' on oxidation with NaOCl followed by acidification gives acetic acid. Deduce structure of A and B. Show the reactions involved.

A compound X is formed by the reaction of a carboxylic acid C_(2)H_(4)O_(2) and an alcohol in the presence of a few drops of H_(2)SO_(4) .The alcohol on oxidation with alkaline KMnO_(4) followed by acidification gives the same carboxylic acid as used in this reaction .Give the names and structures of : The compound X. Also write the reaction.