Microprocessor
While CMP B instruction executes,

 no flags will be affected.
 all flags will be affected.
 only carry flag will be affected.
 only carry and zero flags will be affected.

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Microprocessor
A microprocessor is ALU

 and control unit on a single chip.
 and memory on a single chip.
 register unit and I/O device on a single chip.
 register unit and control unit on a single chip.

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