Rate of a reaction can be expressed by Arrhenius equation as : ${\text{k\hspace{0.17em}=\hspace{0.17em}Ae}}^{\text{-E/RT}}$ In this equation, E       Represents.

The total energy of the reacting molecules at a temperature, T

The energy below which colliding molecules will not react 

The fraction of molecules with energy greater than the activation energy of the reaction

The energy above which all the colliding molecules will react