Question: In allene $\left(\mathrm{C}_{3} \mathrm{H}_{4}\right)$, the type(s) of hybridization of the carbon atoms is (are):
only $\mathrm{sp}^{2}$
$\mathrm{sp}^{2}$ and $\mathrm{sp}$
$s p$ and $\mathrm{sp}^{3}$
$\mathrm{sp}^{2}$ and $\mathrm{sp}^{3}$
Correct Option: , 2
Solution:
