Microprocessor
A high on RESET OUT signifies that

 processing can begin when this signal goes high
 all the registers and counters are being reset and this signal can be used to reset external support chip
 all the registers of the CPU are being reset
 all the registers and counters are being reset

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Microprocessor
PUSH B instruction in 8085 microprocessor causes

 the contents of register B & C to be copied in the stack
 the contents of register B only to be copied in the stack
 the contents of registers B & C to be transferred in the stack and and the registers get cleared
 registers B & C to be cleared

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