Let's classify the devices listed: - Scanner: Input device (takes physical document/image and converts to digital data) - Printer: Output device (takes digital data and prints it on paper) - Monitor: Output device (takes digital data and displays it visually) - Keyboard: Input device (inputs characters/commands) - Mouse: Input device (inputs cursor movement/clicks) - Plotter: Output device (takes digital data and draws vector graphics, often on large paper) Option D (Plotter, Printer, Monitor) contains only output devices.