Choose the correct option(s) for following reaction sequence:
$\underset{\left(\mathrm{P}\right)}{ \mathrm{Monomer}}\mathrm{ }\stackrel{\mathrm{Polymerisation}}{\to }\mathrm{ }\underset{ \underset{\left(\mathrm{Q}\right)}{\left(\mathrm{Polymer}\right)}}{\mathrm{Natural} \mathrm{rubber}}\underset{\mathrm{Zn}}{\overset{{\mathrm{O}}_3}{\to }}\left(\mathrm{R}\right)$

R gives positive result for tollen’s as well as iodoform test

Monomer on reduction with 1 mole H₂ give 2-methyl but-1-ene as major product

All double bonds in natural rubber is cis

Monomer on reaction with HBr gives 1-bromo-3-methyl but-2-ene as major product