The appropriate reagent for the transformation is:
A
Zn(Hg)/HCl
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B
NH2−NH2/OH−
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C
Both (a) and (b)
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D
None of the above
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Solution
The correct option is BNH2−NH2/OH− Both Zn(Hg)/HCl and NH2−NH2/OH− can reduce −COCH3 group to −CH2−CH3 but HCl will also bring about the replacement of ′OH′ group by ′Cl′ . Therefore, the most appropriate reagent is NH2−NH2/OH−.