Concept:Transmission of pressure in fluids refers to Pascal’s principle: pressure applied to an enclosed fluid is transmitted equally in all directions.Explanation:I. Water pumps do not mainly rely on transmission of pressure in fluids; they move water by mechanical action.II. Syringes work by transmitting pressure through the liquid in the barrel.III. Bicycle brakes, especially hydraulic brakes, work by transmitting pressure through the brake fluid.Therefore, only II and III work on the principle of transmission pressure in fluids.Answer:II and III only → Option C.