Which semisolid system consists of dispersions of molecules in an aqueous vehicle rendered jellylike by the addition of a jelly agent?

• A. Ointments
• B. Pastes
• C. Gel
• D. Creams

Answer: (C)

A gel is a semisolid where a liquid phase is immobilized within a three‑dimensional network formed by a gelling agent; when the liquid is water, it’s a hydrogel. The description—dispersions of molecules in an aqueous vehicle made jellylike by adding a jelly agent—fits this exactly, because the gelling agent creates a network that traps the water and gives a jelly‑like consistency. Ointments are typically oil‑based bases, pastes are thickened with solids, and creams are emulsions (two immiscible liquid phases), none of which rely on a gel network to immobilize an aqueous phase.