An operating system manages (a) memory (b) processor (c) disk and I/O devices (d) All of these -Technology

An operating system manages (a) memory (b) processor (c) disk and I/O devices (d) All of these -Technology
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(d) An operating system manages disk and I/O devices as it is responsible for input from keyboard, mouse etc. It also manages the computer memory, so that each process can run most effectively.
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