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In the given transformation,

Question:

In the given transformation, which of the following is the most appropriate reagent ?

1. $\mathrm{NaBH}_{4}$

2. $\mathrm{NH}_{2} \mathrm{NH}_{2}, \stackrel{\ominus}{\mathrm{OH}}$

3. $\mathrm{Zn}-\mathrm{Hg} / \mathrm{HCl}$

4. $\mathrm{Na}, \mathrm{Liq} \cdot \mathrm{NH}_{3}$

Correct Option: , 2

Solution:

Solution not required