What is the correct order of basicity for the given amines in a chlorobenzene medium?
$(A)$ $CH_3CH_2NH_2$
$(B)$ Cyclohexylamine
$(C)$ $N$-Methylpiperidine
$(D)$ Pyrrolidine

Which of the following is the strongest base?

In the reaction $CH_3CH_2CONH_2 \xrightarrow[Br_2]{NaOH} A$,the aqueous solution of $A$ is ............

Given below are two statements :
Statement $I$: Aniline reacts with conc. $H_2SO_4$ followed by heating at $453-473 \ K$ to give $p$-aminobenzene sulphonic acid (sulphanilic acid). This compound contains both nitrogen and sulphur,and thus it gives a blood red colour in the 'Lassaigne's test' due to the formation of ferric thiocyanate,$[Fe(SCN)]^{2+}$.
Statement $II$: In Friedel-Craft's alkylation and acylation reactions,aniline forms a salt with the $AlCl_3$ catalyst. Due to this,the nitrogen atom of aniline acquires a positive charge and acts as a deactivating group,preventing further reaction.
In the light of the above statements,choose the correct answer from the options given below :

In the following reaction,the product $(A)$ is

In the given reaction sequence,$[X]$ will be: