An endothermic reaction `A rarr B` have an activation energy `15 kcal//mol` and the heat of the reaction is `5 kcal//mol`. The activation energy of the reaction `B rarr A` is :

Options

A. `20kcal//mol`
B. `15kcal//mol`
C. `10kcal//mol`
D. `Zero`

Answer

C