Of the following alcohols, the one that would react fastest with conc. HCl and anhydrous ZnCl2  is :

R−OH+HCl→ZnCl2anhydrous   R−Cl+H2O.This is the reaction of alcohols with Lucas reagent. It involves C – O Cleavage.Rate of reactivity …….   R3COH>R2CHOH  >   RCH2OH30-alcohols give immediate turbidity20-alcohols give turbidity in few minutes10-alcohols do not give turbidity at room temperature.CH33C-OH is a 30 alcohol30-alcohols which gives immediate turbidity.