How nitrobenzene reacts with lithium aluminium hydride?

Write structural formula of the compounds $\mathrm{A}$ to $\mathrm{D}$.

${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NO}}_2\underset{\mathrm{conc}. {\mathrm{H}}_2{\mathrm{SO}}_4}{\overset{\mathrm{conc}. {\mathrm{HNO}}_3}{\to }}\mathrm{A}\stackrel{\mathrm{NaSH}}{\to }\mathrm{B}\underset{50\% \mathrm{Ethanol},∆}{\overset{\mathrm{Zn}+{\mathrm{NH}}_4\mathrm{Cl}}{\to }}\mathrm{C}\stackrel{\mathrm{Tollen}\text{'}\mathrm{s} \mathrm{reagent}}{\to }\mathrm{D}$

Which of the following group is detected by Barker-Mulliken's test

Predict the major product that would be obtained on nitration of the following compound.

The structure of the compound formed, when nitrobenzene is reduced by lithium aluminium hydride$\left({\mathrm{LiAlH}}_4\right)$ is

Give balanced chemical equation of reduction of nitrobenzene in neutral medium.

The product $\mathrm{P}$ in the following reaction is

$\mathrm{Ph}-{\mathrm{NO}}_2 \stackrel{\mathrm{Zn}/\mathrm{NaOH}}{\to }\mathrm{P}$

Barker-Mulliken's test can be used for the detection of _____ group.
(A) $-{\mathrm{NH}}_2$    (B) $-{\mathrm{SO}}_4$    (C) $-{\mathrm{NO}}_2$

Enter your correct answer as A, B or C.