When 3-methylbutan-2-ol is treated with HBr, the following reaction takes place:
![](https://static.insightsonindia.in/ncertusercontent/solutions/?domain=gF&l=PROJ13080/1519019517278862.png)
Give a mechanism for this reaction.
(Hint: The secondary carbocation formed in step II rearranges to a more stable tertiary carbocation by a hydride ion shift from 3rd carbon atom.)