An irreversible chemical reaction occurs on a porous catalyst. All the pores are of same size. In strong pore diffusion regime, the observed activation energy is 120 $\text{kJ mol}^{-1}$. The activation energy of diffusion is 10 $\text{kJ mol}^{-1}$. Assuming Arrhenius temperature dependency for both reaction and diffusion, which one of the following is the true activation energy $\text{kJ mol}^{-1}$ of the reaction?