Given below are two statements :

Statement I : Aniline reacts with con. $$\mathrm{H}_2 \mathrm{SO}_4$$, followed by heating at $$453-473 \mathrm{~K}$$ gives $$\mathrm{p}$$-aminobenzene sulphonic acid, which gives blood red colour in the 'Lassaigne's test'.

Statement II : In Friedel - Craft's alkylation and acylation reactions, aniline forms salt with the $$\mathrm{AlCl}_3$$ catalyst. Due to this, nitrogen of aniline aquires a positive charge and acts as deactivating group.

In the light of the above statements, choose the correct answer from the options given below :

The products A and B formed in the following reaction scheme are respectively

Following is a confirmatory test for aromatic primary amines. Identify reagent (A) and (B).

Which of the following reaction is correct?