The correct option is B Muddy water
In sedimentation, the insoluble solid substances settle down and the clear liquid floats on top of it when the mixture is left undisturbed.
In the given options, only in the case of muddy water, the components can be separated. The heavier mud will settle down and then the clear water can be transferred to another beaker carefully without disturbing the mud.
In the rest of the options, the solid components are soluble in water, hence sedimentation is not applicable for separating the components of the mixtures.