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.
 Both A & R are true and R is the correct explanation of A.
 A is true but R is false.
 A is false but R is true.

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Microprocessor
A high on RESET OUT signifies that

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

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