The correct sequence of correct reagents for the following...

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1. A(i) $Fe, HCl$
   (ii) ${Cl}_{2}, HCl$,
   (iii) ${NaNO}_{2}, HCl, 0 ° C$
   (iv) ${H}_{2}O / {H}^{+}$
2. B(i) $Fe, HCl$
   (ii) ${NaNO}_{2}, HCl, 0 ° C$
   (iii) ${H}_{2}O / {H}^{+}$
   (iv) ${Cl}_{2}, {FeCl}_{3}$
3. C(i) ${Cl}_{2}, {FeCl}_{3}$
   (ii) $Fe, HCl$
   (iii) ${NaNO}_{2}, HCl, 0 ° C$
   (iv) ${H}_{2}O / {H}^{+}$
4. D(i) ${Cl}_{2}, {FeCl}_{3}$
   (ii) ${NaNO}_{2}, HCl, 0 ° C$
   (iii) $Fe, HCl$
   (iv) ${H}_{2}O / {H}^{+}$