Correct Answer - d
(d) Here you see a typical `S_(N^(2))` reaction of allyl bromide ,E We have dwown the transtion state for this reaction reactioj,this isnot because we want to encouage you to do this for all `S_(N^(2))` reactions but si that we can explain the role of the allyl syatem allyl compounds reaction ripidly by the `S_(N^(2))` mechanism becasuse the doubl bond stabiilzie te compunds stitionstate by conjugate .
THe benzy l group acts in much the same ways using the `pi` syatem of hte benzene ring for conjugation wit the p- orbital in the treansition state.
