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The Thevenin's equivalent of a circuit operating at,
has 
and 
. At this frequency, the minimal realization of the Thevenin's impedance will have a
Resistor and a capacitor and an inductor
Resistor and a capacitor
Resistor and an inductor
Capacitor and an inductor
Since impedance has non-zero real part
So it has resistance
The impedance is having negative imaginary part. So it has overall reactance as capacitive. It may be purely capacitive or may have both capacitor and inductor having value of capacitive reactance greater than inductive reactance.
But for minimal realization of impedance a resistor and a capacitor will realize the Thevenin impedance.