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# Which of the following is not a chain growth polymerisation process?

$\begin{array}{1 1}(a)\;\text{Free radical addition polymerisation}\\(b)\; \text{Cationic polymerisation}\\(c)\;\text{ Esteric polymerisation}\\(d)\;\text{Anionic polymerisation}\end{array}$

Depending upon the nature of the reactive species involved as an initiator,addition polymerisation occurs by the following three mechanisms:
(b) Cationic polymerisation
(c) Anionic polymerisation
Hence (c) is the correct answer.