The appropriate reagent for the transformation :

Zn(Hg)/HCl

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_{2}

_{2}

, OH

^{-}

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_{2}

/Ni

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NaBH

_{4}

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Solution

The correct option is C NH $_{2}$ NH $_{2}$ , OH $^{-}$
In this reaction, a CO group is converted to $C H_{2}$ group. This can be achieved by Wolff-Kishner reduction which uses reagent $N H_{2} N H_{2}, O H^{-}$ (hydrazine in alkaline medium).
Clemmensen reduction (Zn(Hg)/HCl) cannot be used as in presence of HCl, the alcohol may undergo dehydration.

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