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An organic compound having molecular for...

An organic compound having molecular formula `C_3H_7Br` on treatment with aqueous KOH solution gave the compound (A). When the vapour of the compound (A) was passed over red hot copper at `300^@C` compound (B) was formed. The compound (B) on treatment with `l_2` and dil. NaOH, formed a yellow solid (C). Identify the compounds A,B and C.

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