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

A. an inductor and a capacitor
B. an inductor but no capacitor
C. a capacitor but no inductor
D. Neither inductor nor capacitor

Choose the correct answer from the options given below:

A & D Only

Impedance of the circuit is given by $ Z = \sqrt{R^2+(X_C-X_L)^2}$

For Z to be zero R=0 and $X_C-X_L =0$

Hence the circuit has either

Both inductor and capacitor and $X_C-X_L =0$ or $ X_L = X_C =0$

The correct answer is Option (4) → A & D Only