-------is used to fix the silk /cloth sheet and to hold the typed stencil sheetAPrinting screwBMargin adjusting knobsCCylindrical drumDNone of theseAnswer: C. Cylindrical drum Read Explanation: Cylindrical drum- To fix the silk /cloth sheet and to hold the typed stencil sheet over themMargin adjusting knobs - To adjust the marginal side plates for getting left and right margins on the impression paper.Printing screw - The printing screw helps to adjust to and bottom margin. Read more in App