Arrange these in correct order of decreasing reactivity

Options

A. `I gt II gt III gt IV`
B. `I gt III gt II gt IV`
C. `IV gt III gt II gt I`
D. `IV gt III gt I gt II`

Answer

c

Explanation

This problem includes conceptual mixing of carbocation stability and reactivity of alcohol. Remove the `-OH` group by dehydration and then arrange the carbocation in increasing order of correctly. Order of carbocation stability is same as `S_(N)1` reactivity of alkyl halides.

carbocation stabiltiy The carbocation is formed during the reaction of alochol be removal of `-OH`. more stable the carbocation, more will be its reactivity of carbocation formed during reaction are as given