Question Pool -- Category E7C

What are the distinguishing features of an elliptical filter?
A.
Gradual passband rolloff with minimal stop-band ripple
B.
Extremely flat response over its passband, with gradually rounded stop-band corners
C.
Extremely sharp cutoff, with one or more infinitely deep notches in the stop band
D.
Gradual passband rolloff with extreme stop-band ripple

Answer is C.
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