The necessary and sufficient condition for a rational a

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The necessary and sufficient condition for a rational a function of s, T (s) to be a driving point impedance of an RC network is that all poles and zeros should be—

1. Simple and lie on the negative real axis of the S-plane
2. Complex and lie in the left half of the S-plane
3. Complex and lie in the right half of the S-plane.
4. Simple and lie on the positive real axis of S-plane.

Correct Option: A

NA