2FeCl2 +Cl2 ---> 2FeCl3+ Cl
here one chlorine atom is replaced by Fecl2
We could also write it as P4 +O2-> 2P2O
here is your answer :-
look this attachment :-
hope it's helped !
the oxidation state of chlorine is zero so that
and the oxidation state of ferrous chloride is minus 3 so that there is reduction process .
same situation in ferrous chloride
hence, option number (A ) is correct
because there is reduction of chlorine gas
so it is an oxidising agent
hope it's helped