Which formulation type would likely settle out of a solution if not properly mixed?

• A. Emulsion
• B. Solution
• C. Suspension
• D. Granule

Answer: (C)

The correct answer is identified as the suspension formulation type. Suspensions consist of solid particles dispersed in a liquid medium, and these particles can settle at the bottom if the suspension is not properly mixed. This characteristic necessitates that users shake or stir the product before application to ensure uniform distribution of the active ingredient.

In contrast, emulsions are mixtures of two immiscible liquids where one is dispersed in the other, and they tend to remain stable due to the presence of emulsifiers that help keep the components mixed. Solutions are homogeneous mixtures where solutes are completely dissolved in a solvent, thus they do not settle out. Granules are solid formulations consisting of small particles that do not require mixing with a liquid, which means they do not present the same settling issue as suspensions.