The correct order of increasing reactivity of C-X bond towards nucleophile in the following compounds is :

Options

A. II lt III lt I lt IV
B. IV lt III lt I lt II
C. III lt II lt I lt IV
D. I lt II lt IV lt III

Answer

D

Explanation

(i) Among the given halides (i) aryl halides `(C_(6)H_(5)X)` is least reactive towards nucleophilic substitution because due to reaconance.
(ii) Electron withdrawing (groups =`NO_(2)` groups) at ortho and para position promotes easy displacement of -X of aryl halide.
(iii) Among alkyl halides `3^(@)` halides are more reactive in comparison to `2^(@)` halides because of the formation of more stable carbocation
`therefore` order of reactivity is.