Two non-mixing liquids of densities $\rho$ 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 $pL(p<1)$ in the denser liquid. The density $d$ is equal to:

1. A
   $\{2+(n+1)p\}\rho$
2. B
   $\{2+(n-1)p\}\rho$
3. C
   $\{1+(n-1)p\}\rho$
4. D
   $\{1+(n+1)p\}\rho$