Which of the following alkenes does NOT give 2,3-dimethylbutan-2-ol as the major product on hydration with dilute $\mathrm{H}{}_2\mathrm{SO}{}_4$?

2,3-Dimethylbut-1-ene and 2,3-dimethylbut-2-ene both protonate to the tertiary cation $(\mathrm{CH}{}_3){}_2\mathrm{C}{}^{+}-\mathrm{CH}(\mathrm{CH}{}_3){}_2$. 3,3-Dimethylbut-1-ene reaches it by a methyl shift. 4-Methylpent-1-ene gives a secondary cation with no stabilising 1,2-shift, so it gives 4-methylpentan-2-ol.