The order of reactivity of following alcohols with halogen acids is……….
(A) `CH_(3)CH_(2)-CH_(2)-OH` (B) `CH_(3CH_(2)-underset(CH_(3))underset(|)"CH"-OH`
`(C ) CH_(3)CH_(2)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-OH`

Options

A. `i gt iii gt iii`
B. `iii gt ii gt i`
C. `ii gt i gt iii`
D. `i gt iii gt ii`

Answer

B

Explanation

The reactivity order of alcohols towards halogen is `3^(@) gt 2^(@) gt 1^(@)` as the stability of carbocations is of the order `3^(@) gt 2^(@) gt 1^(@)`.