Which stage in the free radical substitution of methane by chlorine will have the lowest activation
energy?
a ch3• + cl 2 → ch3cl + cl •
b cl • + cl • → cl 2
c cl • + ch4 → ch3• + hcl
d cl 2 → cl • + cl •

I am pretty sure that the stage in the free radical substitution of methane by chlorine which will have the lowest activation energy is B Cl • + Cl • → Cl 2. I choose this option because during termination there is no breaking of bonds within two reactive  radicals which are joined together.

Do hope it will help you!

Iam not sure butch i thinnk it is ab

The molecules contain like 54 of water