Which of the following reagents does NOT convert nitrobenzene into aniline as the main product?

A $Fe / HCl$
B $LiAlH X_{4}$ in ether
C $H X_{2}$ / Pd
D $Sn / HCl$

Answer: B

Sn/HCl, Fe/HCl and catalytic hydrogenation all reduce aromatic nitro groups fully to the amine. LiAlH4 reduces aromatic nitro compounds only as far as azobenzene (bimolecular reduction).

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