Which series of reactions correctly represents chemical relations related to iron and its compound?
Fe $$\buildrel {dil.\,{H_2}S{O_4}} \over
\longrightarrow $ FeSO4 $\buildrel {{H_2}S{O_4},{O_2}} \over
\longrightarrow $ Fe2(SO4)3 $\buildrel {heat} \over
\longrightarrow $$ Fe
Fe $$\buildrel {{O_2} \, {, heat}} \over
\longrightarrow $ FeO $\buildrel {dil.\,{H_2}S{O_4}} \over
\longrightarrow $ FeSO4 $\buildrel {heat} \over
\longrightarrow $$ Fe
Fe $$\buildrel {{Cl_2} \, {, heat}} \over
\longrightarrow $ FeCl3 $\buildrel {heat, \, air} \over
\longrightarrow $ FeCl2 $\buildrel {Zn} \over
\longrightarrow $$ Fe
Fe $$\buildrel {{O_2},\,heat} \over
\longrightarrow $ Fe3O4 $\buildrel {CO,\,{{600}^o}C} \over
\longrightarrow $ FeO $\buildrel {CO,\,{{700}^o}C} \over
\longrightarrow $$ Fe
