Microprocessor
Assertion(A): Address bus is unidirectional. Reason(R): Data bus is bidirectional

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

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Microprocessor
Program counter in a digital computer

 Counts the number of times a subroutine is called.
 Points the memory address of the next instruction to be fetched.
 Counts the number of times the loops are executed.
 Counts the numbers of programs run in the machine.

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