A few statements about centrifugation method are given: I. The mixture containing very small suspended particles is rotated at a high speed in a centrifuge machine. II. The denser particles stay at the top. III. The method is used to separate water from wet clothes in a washing machine. IV. The method can be used in laboratories for separating plasma and platelets. The correct statements are

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