Which is a solution?

• A. Dilutions using oil as an emulsion
• B. A liquid that contains dissolved substances
• C. Water based formulations
• D. Dry granules

Answer: (B)

A solution is a homogeneous liquid in which a substance dissolves in another, forming a single phase at the molecular level. The option describing “a liquid that contains dissolved substances” fits this idea, because the dissolved material is distributed evenly throughout the solvent, producing a uniform composition. The other options describe different kinds of mixtures: an emulsion involves droplets of one liquid dispersed in another and is not a true solution; water-based formulations can be solutions but are often emulsions or suspensions, so they aren’t guaranteed to be true solutions; and dry granules are solid particles that are not dissolved. Therefore, a liquid that contains dissolved substances best represents a solution.