$\mathrm{R}-\mathrm{CH}_{2}-\mathrm{CH}_{2} \mathrm{OH}$ can be converted in $\mathrm{R}-\mathrm{CH}_{2}…
$\mathrm{R}-\mathrm{CH}_{2}-\mathrm{CH}_{2} \mathrm{OH}$ can be converted in $\mathrm{R}-\mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{COOH} .$ The correct sequence of reagents is