Assertion (A): Z-transform is used to analyze discrete time systems and it is also called pulsed transfer function approach.Reason(R): The sampled signal is assumed to be a train of impulses whose strengths, or areas, are equal to the continuous time signal at the sampling instants.

• A. Both A and R are true and R is correct explanation of A
• B. Both A and R are true and R is not correct Explanation of A
• C. A is True and R is false
• D. A is False and R is true