Find the time through which an average current 1.93Amp passed to reduce 0.2mol of $MgCl_2$ into Mg .The current efficiency is 60%

Question

$\begin{array}{1 1}(a)\;\large\frac{10^5}{6}\normalsize sec\\(b)\;\large\frac{10^5}{3}\normalsize sec\\(c)\;10^5sec\\(d)\;\large\frac{5}{3}\normalsize\times 10^4sec\end{array}$