The correct sequential addition of reagents in the preparation of 3 - nitrobenzoic acid from benzene is:

1. ${\mathrm{Br}}_2/{\mathrm{AlBr}}_3,{\mathrm{HNO}}_3/{\mathrm{H}}_2{\mathrm{SO}}_4,\mathrm{Mg}/$ ether, ${\mathrm{CO}}_2,{\mathrm{H}}_3{\mathrm{O}}^{+}$
2. ${\mathrm{Br}}_2/{\mathrm{AlBr}}_3,\mathrm{NaCN},{\mathrm{H}}_3{\mathrm{O}}^{+},{\mathrm{HNO}}_3/{\mathrm{H}}_2{\mathrm{SO}}_4$
3. ${\mathrm{Br}}_2/{\mathrm{AlBr}}_3,{\mathrm{HNO}}_3/{\mathrm{H}}_2{\mathrm{SO}}_4,\mathrm{NaCN},{\mathrm{H}}_3{\mathrm{O}}^{+}$
4. ${\mathrm{HNO}}_3/{\mathrm{H}}_2{\mathrm{SO}}_4,{\mathrm{Br}}_2/{\mathrm{AlBr}}_3,\mathrm{Mg}/$ ether, ${\mathrm{CO}}_2,{\mathrm{H}}_3{\mathrm{O}}^{+}$

Asked in: JEE Main 2021 (26 Aug Shift 1)

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