The reactance of a circuit is zero. It is possible that the circuit contains :- (i) an inductor and a capacitor(ii) an inductor but no capacitor (iii) a capacitor but no inductor  (iv) neither an inductor nor a capacitor(i), (ii)(ii), (iii)(i), (iv)    (iii), (iv)

The reactance of a circuit is zero. It is possible that the circuit contains:

(i) an inductor and a capacitor (ii) an inductor but no capacitor (iii) a capacitor but no inductor (iv) neither an inductor nor a capacitor

To determine which options are possible, we need to understand the concept of reactance. Reactance is the opposition to the flow of alternating current (AC) in a circuit due to the presence of inductors and capacitors.

(i) If a circuit contains both an inductor and a capacitor, the reactance can be non-zero. This option is not possible.

(ii) If a circuit contains only an inductor and no capacitor, the reactance can be non-zero. This option is not possible.

(iii) If a circuit contains only a capacitor and no inductor, the reactance can be zero. This option is possible.

(iv) If a circuit contains neither an inductor nor a capacitor, the reactance will always be zero. This option is possible.

Therefore, the possible combinations are (iii) and (iv).