In which of the following cases is the yield | vedclass

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(D) The rate and yield of the $S_{N}2$ reaction are highly dependent on the steric hindrance around the electrophilic carbon atom. The reactivity orde

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$CH_3CH_2-Br + C_2H_5O^{-} 	ext{ (in } DMSO) ightarrow$

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(D) The rate and yield of the $S_{N}2$ reaction are highly dependent on the steric hindrance around the electrophilic carbon atom. The reactivity order for $S_{N}2$ is: $	ext{Methyl} > 	ext{Primary} > 	ext{Secondary} > 	ext{Tertiary}$.- Option $A$ and $C$ involve tertiary alkyl halides,which undergo $E2$ elimination rather than $S_{N}2$ substitution due to high steric hindrance.- Option $B$ involves a secondary alkyl halide,which is also prone to elimination.- Option $D$ involves a primary alkyl halide $(CH_3CH_2-Br)$ in a polar aprotic solvent $(DMSO)$,which is the ideal condition for an $S_{N}2$ reaction. Therefore,the yield via $S_{N}2$ is maximum in this case.

In which of the following cases is the yield via $S_{N}2$ mechanism maximum?

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