Microprocessor
Which of the following statements for intel 8085 is correct?

 Program Counter (PC) specifies the address of the instruction last executed
 PC specifies the address of the instruction to be executed
 PC specifies the number of instructions executed so far
 PC specifies the address of the instruction being executed

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Microprocessor
Assertion(A): Monostablemultivibrators (IC74121) are used in a microprocessor based system for frequency measurement. Reason(R): Microprocessor counts the number of interrupt signals/second or within a specified interval through ISR.

 Both A & R are true but R is not the correct explanation of A.
 A is true but R is false.
 A is false but R is true.
 Both A & R are true and R is the correct explanation of A.

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