Explanation:
An electrolytic capacitor is a type of capacitor that uses an electrolyte to achieve a larger capacitance than other capacitor types. These capacitors are commonly used in electronic circuits for filtering, smoothing, and energy storage purposes.

The given capacitor is marked as 8F, 220 V. This means that the capacitance of the capacitor is 8 Farads and the maximum voltage that can be applied across the capacitor is 220 V.

The question asks whether the capacitor can be used in a circuit where the potential difference (p.d.) across the capacitor may be 300 V, 500 V, 200 V, or 1000 V. We need to determine whether the capacitor can handle these voltages safely.

The answer is option 'D' which indicates that the capacitor can be used in a circuit where the p.d. across the capacitor may be 1000 V. This means that the capacitor can safely handle a voltage of up to 1000 V without getting damaged.

The reason why the capacitor can handle a voltage of up to 1000 V is that the maximum voltage rating of a capacitor is usually higher than its working voltage. In this case, the maximum voltage rating of the capacitor is 220 V, but it can handle a voltage of up to 1000 V.

Therefore, the given electrolytic capacitor marked as 8F, 220 V can be safely used in a circuit where the p.d. across the capacitor may be up to 1000 V.

Summary:
- The given electrolytic capacitor is marked as 8F, 220 V.
- The capacitor can be used in a circuit where the p.d. across the capacitor may be up to 1000 V.
- The maximum voltage rating of a capacitor is higher than its working voltage.