A nitro-compound among the following that does not react with nitrous acid is:

1.		2.
3.		4.

A nitrogen-containing aromatic compound A reacts with Sn/HCl, followed by HNO₂ to give an unstable compound B. On treatment with phenol, B forms a beautiful coloured compound C with the molecular formula C₁₂H₁₀N₂O. The structure of compound A is:

1.		2.
3.		4.

Nitrobenzene on reaction with conc. HNO₃ /H₂SO₄ at 80 – 100 ºC forms:

1. 1,3– Dinitrobenzene

2. 1,4–Dinitrobenzene

3. 1,2,4–Trinitrobenzene

4. 1,2–Dinitrobenzene