Which of the following statements is appropriate for the electrodes to be used in the electrolytic process?

[answerhappygod]

a) Electrodes provide necessary energy to create or discharge the ions during electrolysis
b) Electrodes are the ion conducting polymer that contains free ions to carry the current
c) Electrodes are the solid conducting materials which allows to carry the current during electrolysis
d) Electrodes provide physical interface between the electrolyte and electrical circuit that provides energy