A drop of liquid of density `rho` is floating half-immersed in a liquid of density `d`. If `rho` is the surface tension the diameter of the drop of the liquid is

A. `sqrt((sigma)/(g(2rho-d)))`

B. `sqrt((2sigma)/(g(2rho-d)))`

C. `sqrt((6sigma)/(g(2rho-d)))`

D. `sqrt((12sigma)/(g(2rho-d)))`