Which of the following statements is/are correct? I. Larger solid particles can be separated from smaller ones by filtration. II. Cream can be separated from milk by churning. III. A mixture of mud and water can be separated by loading, sedimentation and decantation. IV. Grains can be separated from stalks by threshing.

• A. I and II only
• B. II and IV only
• C. I, II and III only
• D. II, III and IV only