Nitrobenzene is converted into aniline by

A $NaNO X_{2}$ / dil. $HCl$
B $Sn / HCl$
C $Br X_{2}$ + $NaOH$
D $CHCl X_{3}$ + $KOH$

Answer: B

Tin and hydrochloric acid (or Fe/HCl, or catalytic hydrogenation) reduce the nitro group fully to the amino group. The other reagents do not reduce nitrobenzene to aniline.

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