Which of the following amine does not react with Hinsberg's reagent at room temperature?

Only the $1^{\circ }$ and $2^{\circ }$ amines can react with the Hinsberg reagent because the hydrogen in both of them is acidic and is replaced during the reaction, but the $3^{\circ }$ amine in benzene sulphonyl chloride does not contain replaceable hydrogen. As a result, the $3^{\circ }$amine triethyl amine ${\left({\mathrm{C}}_2{\mathrm{H}}_5\right)}_3\mathrm{N}$ cannot react with the Hinsberg reagent.