$\mathrm{O}_{2}$ gas will be evolved as a product of electrolysis of :
(A) an aqueous solution of $\mathrm{AgNO}_{3}$ using silver electrodes.
(B) an aqueous solution of $\mathrm{AgNO}_{3}$ using platinum electrodes.
(C) a dilute solution of $\mathrm{H}_{2} \mathrm{SO}_{4}$ using platinum electrodes.
(D) a high concentration solution of $\mathrm{H}_{2} \mathrm{SO}_{4}$ using platinum electrodes.
Choose the correct answer from the options given below :