Which of the following cannot be considered as a step of mechanism in chain reaction of methane with Cl_2 ?

Which of the following cannot be considered as a step of mechanism in

1.	Which of the following cannot be considered as a step of mechanism in chain reaction of methane with Cl_2 ?
Answer» `Cl_2 to CL^()` `CH_4+Cl^()to CH_3Cl + H^()` `Cl^()+CH_4 to CH_3^()+HCL` `Cl^()+CH_3^(**)to CH_3Cl` ANSWER :B