Which option is the correct pair of input hardware and output hardware?

Correct answer: Keyboard and monitor

The direct answer is option A, keyboard and monitor. Input hardware is a physical device used to send data or instructions into a computer. Output hardware presents the computer's processed result to the user. A keyboard sends letters, numbers and commands into the computer, so it is an input device. A monitor displays text, images and video from the computer, so it is an output device. Therefore option A correctly pairs input with output. Option B, browser and antivirus, names software programs, not hardware devices. A browser displays web pages and antivirus protects software and files. Option C, RAM and ROM, names types of memory hardware, but neither is normally described as the requested input-output pair; both store or hold data. Option D, operating system and driver, names software components that manage hardware or help it work, so neither is an input-output hardware pair. The direction is the key: information goes into the computer through a keyboard and comes out for viewing through a monitor. Memory trick: keyboard puts information in; monitor makes information visible.