The correct choice is (a) erases a portion of line, arc, circle or a 2D poly line between two selected points
The explanation is: The command ‘break’ is used for erases a portion of line, arc, circle or a 2D poly line between two selected points. Command ‘pedit’ is used for editing of poly line properties. Command ‘U’ is used for reverses the effects of a series of previously used commands.