Power dissipation is maximum at option (c) Pure resistive circuit
In an AC circuit, the power dissipated in the circuit is given as follows
The ϕ is the phase difference between the current and the voltage.
In the purely resistive and capacitive circuits, the phase difference is 90∘, so the power dissipated tends o zero.
But in a purely resistive circuit, the voltage and current are in the same phase so the phase difference is zero. Hence, it will have maximum power dissipation as cosϕ=1 in this case.