A first order reaction is 50% completed in 45 minute at $87^oC$ and in 9minutes at $127^oC$.The energy of activation of the reaction is

Question

$\begin{array}{1 1}(a)\;2.82RKJ/mol&(b)\;5.81RKJ/mol\\(c)\;6.65RKJ/mol&(d)\;11.97RKJ/mol\end{array}$