# Which of the following process organic peroxides undergo in free radical addition polymerisation?

$\begin{array}{1 1}(a)\;\text{homolytic fusion}&(b)\; \text{homolytic fission}\\(c)\;\text{heterolytic fission}&(d)\;\text{heterolytic fusion}\end{array}$

Organic peroxides undergo homolytic fission to form free radicals which act as initiators in an chain initiation reaction in free radical addition polymerisation.
Hence (b) is the correct answer.