Marform is

A.A darwing process that forms metal sheet by using a movable steel punch and a rubber headed ram
B.Is a foming process on lathe in which movement of tool is neither governed by cross slide nor by compound slide
C.Is a forming tool and on lathe machine to generate spherical surfaces
D.A work holding device in which plane of rotation can be changed while working
E.Is a gauge used to check regular surfaces