An aqueous solution of electrolyte $Ag_2SO_4$ was electrolyzed in a cell having platinum electrodes till 1.6 g of oxygen was liberated at the anode . What was the mass of silver deposited at the cathode ?

Question

$\begin{array}{1 1} (a)0.8g \\ (b)108.8\;g \\(c) 1.6\;g \\(d)21.6\;g \end{array} $