The correct answer is options (ii) and (iv).Concept:Mixtures:A mixture is a substance that consists of two or more elements or compounds not chemically combined together.For Example - Air is a mixture of gases like oxygen, nitrogen, argon, CO2, and water vapour. Explanation:Types of Mixtures:Homogeneous Mixture:Those mixtures, in which the substances are completely mixed together and are indistinguishable from one another, are called homogeneous mixtures.For example Soda water, Soft drinks, lemonade, salt or sugar solution, etc.Heterogeneous Mixture:Those mixtures in which the substances remain separate and one substance is spread throughout the other substance as small particles, droplets, or bubbles are called heterogeneous mixtures.All the suspensions and colloids are heterogeneous mixtures.For Example: - Sugar and sand mixture, muddy river water, soap solution. Common salt + lemon juice Homogeneous mixtureSand + lemon juiceHeterogeneous mixturewater + lemon juice Homogeneous mixtureCommon salt + waterHomogeneous mixture