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Compound (A) of molecular formula C(9)H(...

Compound `(A)` of molecular formula `C_(9)H_(7)O_(2)Cl` exists in ketoform and predominantly in enolic form `(B)`. On oxidation with `KMnO_(4)`, `(A)` gives m-chlorobenzoic acid. Identify `(A)` and `(B)`.

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