Concept:A separating funnel separates two immiscible liquids (liquids that do not mix and form two layers).Explanation:Water and vegetable oil do not mix: the oil floats on the water. The tap is opened to run off the lower water layer, leaving the oil.Sulphur and water (insoluble solid in liquid) are separated by filtration. Salt and water (a solution) by evaporation or distillation. Vegetable oil and kerosene mix completely (miscible), so they do not form layers.Answer:Option D (Water and vegetable oil)