Which of the following reaction(s) can be used for the preparation of alkyl halides?

(I) CH$_3$CH$_2$OH + HCl
(II) CH$_3$CH$_2$OH + HCl $\rightarrow$
(III) (CH$_3$)$_3$COH + HCl $\rightarrow$
(IV) (CH$_3$)$_2$CHOH + HCl (Anhyd. ZnCl$_2$)