A) \[C-\overset{C}{\mathop{\overset{|}{\mathop{C}}\,}}\,-C-C-C\] and \[C-\overset{C}{\mathop{\overset{|}{\mathop{\underset{C}{\mathop{\underset{|}{\mathop{C}}\,}}\,}}\,}}\,-C\]
B) \[C-\overset{{}}{\mathop{\overset{{}}{\mathop{\underset{C}{\mathop{\underset{|}{\mathop{C}}\,}}\,}}\,}}\,-\overset{C}{\mathop{\overset{|}{\mathop{C}}\,}}\,\] and \[\overset{C}{\mathop{\overset{|}{\mathop{C}}\,}}\,-\overset{{}}{\mathop{\overset{{}}{\mathop{\underset{C}{\mathop{\underset{|}{\mathop{C}}\,}}\,}}\,}}\,-C\]
C)
and \[C-C-\overset{C}{\mathop{\overset{|}{\mathop{\underset{C}{\mathop{\underset{|}{\mathop{C}}\,}}\,}}\,}}\,\]
D) \[C-C-C-C\] and \[C-C-\underset{C}{\mathop{\underset{|}{\mathop{C}}\,}}\,\]
Correct Answer: A
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