Which of the following compounds contain after the carbon atoms in the same hybridisation state?

Which of the following compounds contain after the carbon atoms in the

1.	Which of the following compounds contain after the carbon atoms in the same hybridisation state?
Answer» `H-C -= C -C -= C-H` `CH_(3) -C -= C- CH_(3)` `CH_(2)= C = CH_(2)` `CH_(2)= CH- CH= CH_(2)` Solution : `because` EVERY CARBON have one DOUBLE bond