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

• A

  (i) $\mathrm{Fe},\mathrm{HCl}$
  (ii) ${\mathrm{Cl}}_2,\mathrm{HCl}$,
  (iii) ${\mathrm{NaNO}}_2,\mathrm{HCl},0°\mathrm{C}$
  (iv) ${\mathrm{H}}_2\mathrm{O}/{\mathrm{H}}^{+}$
• B

  (i) $\mathrm{Fe},\mathrm{HCl}$
  (ii) ${\mathrm{NaNO}}_2,\mathrm{HCl},0°\mathrm{C}$
  (iii) ${\mathrm{H}}_2\mathrm{O}/{\mathrm{H}}^{+}$
  (iv) ${\mathrm{Cl}}_2,{\mathrm{FeCl}}_3$
• Correct answer
  C

  (i) ${\mathrm{Cl}}_2,{\mathrm{FeCl}}_3$
  (ii) $\mathrm{Fe},\mathrm{HCl}$
  (iii) ${\mathrm{NaNO}}_2,\mathrm{HCl},0°\mathrm{C}$
  (iv) ${\mathrm{H}}_2\mathrm{O}/{\mathrm{H}}^{+}$
• D

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

Hence, the correct answer is option: 'C'.