d
$\mathrm{F}_{2}-\mathrm{F}_{1}=$ upthrust
$\therefore \mathrm{F}_{2}=\mathrm{F}_{1}+$ upthrust
$\mathrm{F}_{2}=\left(\mathrm{p}_{0}+\rho \mathrm{gh}\right) \pi \mathrm{R}^{2}+v\rho g$
$=\mathrm{p}_{0} \pi \mathrm{R}^{2}+\rho \mathrm{g}\left(\pi \mathrm{R}^{2} \mathrm{h}+\mathrm{V}\right)$
Most appropriate option is $(D).$
