The major product obtained in the reaction of aniline with acetic anhydride is

Among the following,

the compounds which can be reduced with formaldehyde and conc. aq. $\mathrm{KOH},$ are:

The compound $\mathrm{X}$ in the following reaction scheme:

 is:

The following transformation

can be carried out in three steps. The reagents required for these three steps in their correct order, are:

The major products of the following reaction.

 are

The major product of the following reaction. 

 is

In the following reaction, $\mathrm{P}$ gives two products $\mathrm{Q}$ and $\mathrm{R}$ each in $40\%$ yield.

If the reaction is carried out with $420 \mathrm{mg}$ of $\mathrm{P}$, the reaction yields $108.8 \mathrm{mg}$ of $\mathrm{Q}$. The amount of $\mathrm{R}$ produced in the reaction is closest to