Two cylinders of same cross section area and length L but made of two material of densities ${\mathrm{d}}_1$  and  ${\mathrm{d}}_2$ are connected together to form a cylinder of length 2L. The combination floats in a liquid of density d with a length L/2 above the surface of the liquid. If  ${\mathrm{d}}_1>{\mathrm{d}}_2$ then

 

• A

  ${\mathrm{d}}_1>\frac{3}{4}\mathrm{d}$

• B

  $\frac{\mathrm{d}}{2}>{\mathrm{d}}_1$

• C

  $\frac{\mathrm{d}}{4}>{\mathrm{d}}_1$

• D

  $\mathrm{d}<{\mathrm{d}}_1$