What is the cell potential, in V, of the reaction below?

\[{{\text{I}}_2} + {\text{2}}{{\text{S}}_2}{\text{O}}_3^{2 - } \to {\text{2}}{{\text{I}}^ - } + {{\text{S}}_4}{\text{O}}_6^{2 - }\]

     \(\frac{1}{2}{{\text{S}}_4}{\text{O}}_6^{2 - }{\text{(aq)}} + {{\text{e}}^ - } \rightleftharpoons {{\text{S}}_2}{\text{O}}_3^{2 - }{\text{(aq)}}\)     \({E^\Theta } =  + 0.09{\text{ V}}\)

     \({{\text{I}}_2}{\text{(aq)}} + {\text{2}}{{\text{e}}^ - } \rightleftharpoons {\text{2}}{{\text{I}}^ - }{\text{(aq)}}\)     \({E^\Theta } =  + 0.54{\text{ V}}\)

A.     \( + 0.63\)

B.     \( + 0.45\)

C.     \( - 0.45\)

D.     \( - 0.63\)

B