Microprocessor
At the beginning of a fetch cycle, the contents of the program counter are

 transferred to memory address register .
 transferred to memory data register.
 incremented by one.
 transferred to address bus.

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Microprocessor
PUSH B instruction in 8085 microprocessor causes

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

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