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