MCQ
Select best reagent to carry out above conversion


- A$LiAlH_4$
- ✓$NaBH_4$
- C$NH_2-NH_2+H_2O_2$
- D$H_2\, (excess) / Ni, \Delta $

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(Nearest integer)
$\left(\mathrm{h}=6.63 \times 10^{-34}\, \mathrm{Js}, \mathrm{c}=3.00 \times 10^{8} \,\mathrm{~ms}^{-1}\right)$