15. POLYMERS (HM)
Explanation:
(c) \(\mathop {n(C{H_2} = \mathop {\mathop {C - }\limits_{|\,\,\,\,\,} }\limits_{Cl\,\,\,} CH = C{H_2}}\limits_{{\rm{Chloroprene}}} ) \to \)\(\mathop {{{\left( {C{H_2} - \mathop {\mathop {C = }\limits_{|\,\,\,\,\,} }\limits_{Cl\,\,\,} CH - C{H_2}} \right)}_n}}\limits_{{\rm{Neoprene}}} \)