Correct option is A
The correct answer is B, C and D only.
· Optical Mark Reader (OMR) (B) is an input device used to read marked data from documents, typically in exams or surveys.
· Graphic Tablet (C) is an input device that allows users to draw or input data with a stylus.
· Light Pen (D) is an input device used to select or draw on the screen by pointing to it.
· Headphones (A) are output devices, as they produce sound for the user.
· Projector (E) is an output device, as it projects images or videos onto a screen.
Information Booster
1. Optical Mark Reader (OMR): A device that reads marks on paper, commonly used in exams to automate grading.
2. Graphic Tablet: An input device that allows precise drawing and handwriting, often used by designers and artists.
3. Light Pen: A pointing device used to interact with the screen by detecting light emitted by the monitor.
Additional Knowledge
· Headphones (Output): Incorrect. Headphones are output devices, used for delivering sound to the user.
· Projector (Output): Incorrect. A projector is used to display visual content onto a screen, making it an output device.