The correct option is
B Oxidant:
Cl2 ; Reductant:
K2MnO4Here, in this reaction
Cl2 is the oxidant and
K2MnO4 is reductant.
Because the oxidation state of Cl2 changes 0→−1, and decrease in oxidation state means it is reducing and self reducing is always oxidant for other.
And Mn O.S. is changing +6 to +7, so Mn is increasing oxidation state so oxidising and as self oxidising is reductant for other. So this reductant.