A) \[\overset{+\delta }{\mathop{C{{H}_{2}}}}\,=CH-\overset{-\delta }{\mathop{CHO}}\,\]
B) \[\overset{-\delta }{\mathop{C{{H}_{2}}}}\,=CH-\overset{+\delta }{\mathop{CHO}}\,\]
C) \[\overset{-\delta }{\mathop{C{{H}_{2}}}}\,=CH-\overset{+\delta }{\mathop{CHO}}\,\]
D) \[\overset{+\delta }{\mathop{C{{H}_{2}}}}\,=CH-\overset{-\delta }{\mathop{CHO}}\,\]
Correct Answer: D
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