Which of the following type of dispersion is either water in oil or oil in the water?

An emulsion is a dispersion that may be either water-in-oil or oil-in-water. A gel is a two-phase system containing a very fine solid particle that, when mixed, is difficult to distinguish between the two phases, and it is considered a semisolid form. Lotions are a liquid for topical application that contains insoluble solids or liquids, and an ointment is a homogeneous, viscous, semi-solid preparation, most regularly a greasy, thick oil (oil 80% and water 20%) with a high viscosity that is intended for external application to the skin or mucous membranes.