The reagent among the following that does not reduce an aryl nitro compound to an amine is:

1. H₂(excess) / Pt

2. LiAlH₄ in ether

3. Fe and HCI

4. Sn and HCI

The reagent employed in converting nitromethane to methylamine is:
 

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.

Consider the following reaction sequence:
  \(\small{\begin{aligned}\xrightarrow[]{{Sn/HCl}}\ A \ \xrightarrow[0-5\ ^\circ C]{NaNO_2/HCl}\ B \ \xrightarrow[]{HBF_4}\ C \ \xrightarrow[Cu\ \Delta]{NaNO_2}\ D\end{aligned}}\)

The major product D in the above-mentioned reaction is:

1.		2.
3.		4.