Which is the example of branch isomerization [NCERT 1976]

• A. \[\underset{{}}{\mathop{\underset{{}}{\mathop{\overset{C}{\mathop{\overset{|}{\mathop{C-C-C}}\,}}\,}}\,}}\,-C\]- C and \[\underset{C}{\mathop{\underset{|}{\mathop{\overset{C}{\mathop{\overset{|}{\mathop{C-C-C}}\,}}\,}}\,}}\,\]
• B. \[\underset{C}{\mathop{\underset{|}{\mathop{\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C}{\mathop{\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|}{\mathop{C-C-C}}\,}}\,}}\,}}\,\] and \[\underset{C}{\mathop{\underset{|}{\mathop{\overset{C\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C-C-C}}\,}}\,}}\,}}\,\]
• C. \[\begin{matrix} C \\ C \\ \end{matrix}>C-C-C\] and \[\underset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C}{\mathop{\underset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|}{\mathop{\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,C}{\mathop{\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|}{\mathop{C-C-C}}\,}}\,}}\,}}\,\]
• D. \[C-C-C-C\] and \[\underset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C}{\mathop{\underset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|}{\mathop{C-C-C}}\,}}\,\]