The correct sequence of correct reagents for the following transformation is :-

1. (i) $\mathrm{Fe},\mathrm{HCl}$
   (ii) ${\mathrm{Cl}}_2,\mathrm{HCl}$,
   (iii) ${\mathrm{NaNO}}_2,\mathrm{HCl},0°\mathrm{C}$
   (iv) ${\mathrm{H}}_2\mathrm{O}/{\mathrm{H}}^{+}$
2. (i) $\mathrm{Fe},\mathrm{HCl}$
   (ii) ${\mathrm{NaNO}}_2,\mathrm{HCl},0°\mathrm{C}$
   (iii) ${\mathrm{H}}_2\mathrm{O}/{\mathrm{H}}^{+}$
   (iv) ${\mathrm{Cl}}_2,{\mathrm{FeCl}}_3$
3. (i) ${\mathrm{Cl}}_2,{\mathrm{FeCl}}_3$
   (ii) $\mathrm{Fe},\mathrm{HCl}$
   (iii) ${\mathrm{NaNO}}_2,\mathrm{HCl},0°\mathrm{C}$
   (iv) ${\mathrm{H}}_2\mathrm{O}/{\mathrm{H}}^{+}$
4. (i) ${\mathrm{Cl}}_2,{\mathrm{FeCl}}_3$
   (ii) ${\mathrm{NaNO}}_2,\mathrm{HCl},0°\mathrm{C}$
   (iii) $\mathrm{Fe},\mathrm{HCl}$
   (iv) ${\mathrm{H}}_2\mathrm{O}/{\mathrm{H}}^{+}$

Asked in: JEE Main 2021 (27 Jul Shift 2)

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