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A) Word processing software
B) An operating system
C) A printer attached
D) A virus checking program
Every computer must have basic hardware and some level of operating system. Hardware that MUST be in every computer is: Power Supply, Motherboard, CPU & RAM Basic Hardware and Software (not required) CD/DVD Drives Hard Drives Floppy Drive Keyboard Mouse Monitor Operating System (Windows XP, Vista, WIN7 & WIN8.1)
Option 'D' A virus checking program out of all the options given ,option 'D' is the nearest one.
An Operating system. Evey computer to work needs a media which is OS weather it may be DOS,windows, Linux.Only if you have OS, you can think of printer, Application and AntiVirus.
technically its option B operating system. Computer is workable without other three......
All computers must have an operating system.
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