The increasing order of reduction of alkyl halides with zinc and dilute $\mathrm{HCl}$ is

Arrange the following carbanions in order of their decreasing stability.

$\left(\mathrm{A}\right) {\mathrm{H}}_3\mathrm{C}-\mathrm{C}\equiv {\mathrm{C}}^{-} \left(\mathrm{B}\right) \mathrm{H}-\mathrm{C}\equiv {\mathrm{C}}^{-} \left(\mathrm{C}\right) {\mathrm{H}}_3\mathrm{C}-{{\mathrm{CH}}_2}^{-}$

Arrange the following alkyl halides in decreasing order of the rate of $\mathrm{\beta }$-elimination reaction with alcoholic $\mathrm{KOH}$.

Which are the correct IUPAC names of the following compound?

Which are the correct IUPAC name of the following compound?