Microprocessor
Consider the following statements: Arithmetic Logic Unit (ALU) 1.Performs arithmetic operations 2.Performs comparisons. 3.Communicates with I/O devices 4.Keeps watch on the system Which of these statements are correct?

 1 and 2 only
 3 and 4 only
 1, 2, 3 and 4
 1, 2 and 3

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Microprocessor
Assertion(A): The frequency of 8085 system is ½ of the crystal frequency. Reason(R): Microprocessor (8085) requires a two phase clock.

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

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