The standard electrode potentials of elements A,B and C are+0.68, -2.50 and -0.50 V respectively.The correct order of their reducing powers is:

The standard electrode potential values of the elements A, B and C are 0.68, -2.50 and -0.50 V respectively. The order of their reducing power is :

The standard reduction electrode potential values of the elements A, B and C are + 0.68, - 2.50 and -0.50 V respectively. The order of their reducing power is