Correct order of reagents for a conversion through a diazonium salt

1. A.
   $\xrightarrow{Sn/HCl}/\xrightarrow{{Br}_{2}}/\xrightarrow{{NaNO}_{2}}/\xrightarrow{\text{~NaBr~}}$
2. B.
   $\xrightarrow{Sn/HCl}/\xrightarrow{KBr}/\xrightarrow{{Br}_{2}}/\xrightarrow{H^{+}}$
3. C.
   $\xrightarrow{{NaNO}_{2}}/\xrightarrow{HCl}/\xrightarrow{KBr}/\xrightarrow{H^{+}}$
4. D.
   $\xrightarrow{{Br}_{2}/Fe}/\xrightarrow{Sn/HCl}/\xrightarrow{{NaNO}_{2}/HCl}/\xrightarrow{CuBr/HBr}$

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

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1. A.
   ${HNO}_{2},Fe/H^{+},{HNO}_{2},KI,H_{2}O/H^{+}$
2. B.
   ${HNO}_{2},KI,Fe/H^{+},{HNO}_{2},H_{2}O/$ warm
3. C.
   ${HNO}_{2},KI,{HNO}_{2},Fe/H^{+},H_{2}O/H^{+}$
4. D.
   ${HNO}_{2},Fe/H^{+},KI,{HNO}_{2},H_{2}O/$ warm

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1. A.
   (i) ${Br}_{2}$ (aq) (ii) ${LiAlH}_{4}$ (iii) $H_{3}O^{+}$
2. B.
   (i) ${Br}_{2},Fe$ (ii) $Fe,H^{+}$(iii) ${LiAlH}_{4}$
3. C.
   (i) $Fe,H^{+}$(ii) ${Br}_{2}$ (aq) (iii) ${HNO}_{2}$ (iv) $H_{3}{PO}_{2}$
4. D.
   (i) $Fe,H^{+}$(ii) ${Br}_{2}$ (aq) (iii) ${HNO}_{2}$ (iv) $CuBr$

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1. A.
   (i) $Fe/H^{+}$, (ii) HONO, (iii) $CuCl$, (iv)${KMnO}_{4}$, (v) ${Br}_{2}$
2. B.
   (i) ${KMnO}_{4}$, (ii) ${Br}_{2}/Fe$, (iii) $Fe/H^{+}$, (iv) ${Cl}_{2}$
3. C.
   (i) ${Br}_{2}/Fe$, (ii) $Fe/H^{+}$, (iii) $HONO$, (iv) $CuCl$, (v) ${KMnO}_{4}$
4. D.
   (i) ${Br}_{2}/Fe$, (ii) $Fe/H^{+}$, (iii) ${KMnO}_{4}$, (iv) ${Cl}_{2}$

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