The major product of the following chemical reaction is :

$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{3}$

$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}$

$\left(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CO}\right)_{2} \mathrm{O}$

$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHO}$