Correct Answer - Option 4 : 92.37%
\({{\rm{P}}_{{\rm{sav}}}} = \frac{{{{\rm{P}}_{\rm{C}}} + \frac{{{{\rm{P}}_{\rm{C}}}{{\rm{\mu }}^2}}}{4}}}{{{{\rm{P}}_{\rm{C}}}\left( {1 + \frac{{{{\rm{\mu }}^2}}}{2}} \right)}} \times 100\)
\( = \frac{{1 + \frac{{0.36}}{4}}}{{1 + \frac{{0.36}}{2}}} \times 100 = \frac{{1.09}}{{1.18}} \times 100 = 92.37{\rm{\% }}\)