Butane molecule is converted to 2-methyl propane by Isomerisation in the presence of the foll--

$\mathrm{AlCl}_{3}, \mathrm{H}_{2} \mathrm{SO}_{4}, 300^{\circ} \mathrm{C}$

$\mathrm{Al}_{2} \mathrm{O}_{3}, \mathrm{HCl}, 150^{\circ} \mathrm{C}$

$\mathrm{Al}_{2} \mathrm{O}_{3}, \mathrm{H}_{2} \mathrm{SO}_{4}, 150^{\circ} \mathrm{C}$

$\mathrm{AlCl}_{3}, \mathrm{HCl}^{300^{\circ} \mathrm{C} .}$