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______ is not an input device.
1. Mouse
2. Keyboard
3. VDU
4. Light Pen

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Correct Answer - Option 3 : VDU

The correct answer is VDU.

  • VDU is not an input device.

  • VDU stands for Visual Display Unit.
    • A Visual Display Unit displays images generated by a computer or other electronic device. 
    • VDU is synonymously like "monitor," but it can also refer to another type of display, such as a digital projector.
    • Types of VDU are:
      • Liquid Crystal Displays
      • Cathode Ray Tube
      • Plasma screens

  • Keyboard, mouse, and light pen are all input devices.

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