Solution:

Option (ii) is the answer.

The simplest peroxide (oxygen-oxygen single bond) is hydrogen peroxide. It is an oxidizing agent utilized in many synthetic processes.
In the industrial procedure, 30% ice-cold sulphuric acid is electrolyzed at a high current density to produce hydrogen peroxide. The peroxidisulphate is hydrolyzed to generate hydrogen peroxide. Thus, sulphuric acid electrolysis yields hydrogen peroxide. So the proper answer is B.