Which of the following is not an input device?

The correct answer is (b) LED Panel.
Explanation:
● LED Panel is an output device, used for displaying visual output on a screen.

● A device that shows information on a screen cannot provide data input to the computer.

● Hence, LED Panel falls under the category of output units and not input devices.
Information Booster:

● Touchpad helps move the cursor and acts as an input device.

● Scanner converts images/text into digital form as input.

● Light Pen is used for drawing and pointing on screen as input.

● Output devices show processed results.

● Input devices send raw data to system for processing.
Additional Information:

● (a) Touchpad – Used mainly in laptops to control pointer movement; input category.

● (c) Scanner – Captures documents/photos and stores them digitally; input category.

● (d) Light Pen – Allows users to select or draw directly on monitor; input type.