Which of the following compounds gives the carbylamine reaction?

Secondary nitro compounds when react with $HNO_2$ form crystalline solids which on treatment with $NaOH$ give

Assertion: Benzene diazonium chloride does not give a test for nitrogen.
Reason: Loss of $N_2$ gas takes place during heating.

An organic compound $A$ on treatment with benzene sulphonyl chloride gives compound $B$. $B$ is soluble in dil. $NaOH$ solution. Compound $A$ is:

$A$ positive carbylamine test is given by :-
$(a)$ $N,N$-Dimethylaniline
$(b)$ $2,4$-Dimethylaniline
$(c)$ $N$-methyl-$o$-methylaniline
$(d)$ $p$-Methylbenzylamine

Which of the following amines forms a clear solution when treated with benzene sulphonyl chloride and excess of potassium hydroxide?