Final answer:
Option A. A liquid preparation that mixes fine droplets of oil in water, such as castor oil, is called an emulsion.
Step-by-step explanation:
A liquid preparation that mixes fine droplets of an oil in water, like castor oil, is known as an emulsion. Emulsions are colloidal dispersions where one immiscible liquid is dispersed throughout another. Common examples include milk, which is an emulsion of butterfat in water, and mayonnaise, which is an emulsion of oil in vinegar. Emulsions are often stabilized with emulsifying agents to prevent the dispersed phase from coalescing and separating.
An emulsion is a liquid preparation that mixes fine droplets of an oil in water. Emulsions are colloids formed by the dispersion of a hydrophobic liquid in water, bringing two mutually insoluble liquids, such as oil and water, in close contact. These emulsions are usually stabilized by an emulsifying agent, which inhibits the coalescence of the dispersed liquid. For example, mayonnaise is an emulsion of oil in vinegar, with egg yolk components acting as the emulsifying agents.