Which of the following peripheral devices are considered as only input devices?
A. Headphone
B. Optical Mark Reader (OMR)
C. Graphic Tablet
D. Light Pen
E. Projector
Choose the correct answer from the options given below:

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.