Two non-mixing liquids of densities $\mathrm{\rho }$ and $n\rho$(n > 1) are put in a container. The height of each liquid is h. A solid cylinder of length L and density d is put in this container. The cylinder floats with its axis vertical and length pL(p < l) in the denser liquid. The density d is equal to:

• A

  {1+(n+1)p}$\mathrm{\rho }$

• B

  $\{2+(\mathrm{n}+1\left)\mathrm{p}\right\}\mathrm{\rho }$

• C

  $\text{{2+(n-1)p}ρ}$

• D

  $\{1+(\mathrm{n}-1\left)\mathrm{p}\right\}\mathrm{\rho }$