Concept:A capacitor behaves differently with alternating current (AC) and direct current (DC), and it can also store electrical energy.
Explanation:A parallel plate capacitor blocks DC only after it has fully charged up to the applied DC voltage.
Before that, it allows a temporary charging current to flow.
In an AC circuit, the capacitor continuously charges and discharges, so it allows AC to pass through.
Because of this, capacitors are used to separate the AC and DC components of a signal.
Additionally, a capacitor is primarily used to store energy in the electric field between its plates.
Hence, all the given statements are correct.
Answer:D. I, II and III