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In the following, identify the compounds...

In the following, identify the compounds/reaction conditions represented by the alphabets `(A), (B)`, and `( C)`.
`H_(3) C-CH=CH-CHO overset(NaBH_4)rarr (A) overset (HCl) underset(ZnCl)rarr (B) overset(KCN) underset(H^(+))rarr ( C)`.

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To solve the question, we will identify the compounds and reaction conditions represented by (A), (B), and (C) step by step. ### Step 1: Identify Compound (A) The starting compound is an alpha-beta unsaturated aldehyde, specifically butanaldehyde (H3C-CH=CH-CHO). When this compound is treated with sodium borohydride (NaBH4), it selectively reduces the aldehyde functional group to an alcohol. The reaction can be summarized as follows: - **Starting Compound**: H3C-CH=CH-CHO (butanaldehyde) - **Reagent**: NaBH4 ...
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