Me3SiCl is used during polymerisation of organic silicones because
(i) the chain length of organic silicone polymers can be controlled by adding
(ii) Me3SiCl blocks the end terminal of a silicone polymer
(iii) Me3SiCl improves the quality and yield of the polymer
(iv) Me3SiCl acts as a catalyst during polymerisation
Option (i) and (ii) are the answers.