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An organic compound (A) has molecular fo...

An organic compound (A) has molecular formula `(C_5H_10O)` gave a positive 2, 4-DNP test but a negative Tollen’s reagent test. It was oxidized to carboxylic acid (B) with molecular formula `(C_3H_6O_2)` when treated with alkaline `KMnO_4` under vigorous conditions. Sodium salt of (B) gave a hydrocarbon (C) in Kolbe's electrolytic reduction. Identify (A), (B) and (C) and write the reactions involved.

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