The density of kerosene is $800\mathrm{kg} {\mathrm{m}}^{-3}$. Its relative density is

In a water container, an aluminium piece of volume $0.5{ \mathrm{m}}^3$ is lowered through an external force, until it is completely submerged. In another identical water container, a lead piece of same volume was similarly submerged using the same amount of external force. The mass density of lead is $4$ times larger than the mass density of the aluminium. If $F_A$ and $F_L$ are the buoyancy forces acting on aluminum and lead respectively, then which of the following statement is correct ?