Which of the following conjugate bases is stabilized to a greater extent due to solvation of ammonia and amines?

Which of the following groups increases the basic strength of substituted aniline?

With respect to the following reaction,consider the given statements:
$C_6H_5NH_2 \xrightarrow{HNO_3, H_2SO_4, 288 \ K} \text{products}$
$(A)$ $o$-Nitroaniline and $p$-nitroaniline are the predominant products.
$(B)$ $p$-Nitroaniline and $m$-nitroaniline are the predominant products.
$(C)$ $HNO_3$ acts as an acid.
$(D)$ $H_2SO_4$ acts as an acid.

Which of the following gives a bad smell (foul odor) when treated with $CHCl_3 / KOH$?

Aniline reacts with excess $Br_2 / H_2O$ to give the major product.

$C_{6}H_{5}NO_{2}$ $\xrightarrow{Sn+HCl} A$ $\xrightarrow{C_{6}H_{5}N_{2}^{\oplus}Cl^{\ominus}} P$
(Yellow coloured compound)
Consider the above reaction,the Product "$P$" is: