A) \[-(C{{H}_{2}}-\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,=CH-C{{H}_{2}}){{-}_{n}}\]
B) \[-(C{{H}_{2}}-CH=CH-C{{H}_{2}}-\underset{{{C}_{6}}{{H}_{5}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{2}}){{-}_{n}}\]
C) \[-(C{{H}_{2}}-CH=CH-C{{H}_{2}}-\underset{CN}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{2}}){{-}_{n}}\]
D) \[-(C{{H}_{2}}-\overset{Cl}{\mathop{\overset{|}{\mathop{C}}\,}}\,=CH-C{{H}_{2}}){{-}_{n}}\]
Correct Answer: B
Solution :
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