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(D) At resonance,the inductive reactance $X_L$ is equal to the capacitive reactance $X_C$,i.e.,$X_L = X_C$.Consequently,the voltage across the inducto

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$V_4$

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(D) At resonance,the inductive reactance $X_L$ is equal to the capacitive reactance $X_C$,i.e.,$X_L = X_C$.Consequently,the voltage across the inductor $(V_L = I X_L)$ and the voltage across the capacitor $(V_C = I X_C)$ are equal in magnitude but opposite in phase.The voltmeter $V_4$ is connected across the series combination of the inductor $L$ and the capacitor $C$.The net voltage across this combination is given by $V_4 = |V_L - V_C|$.Since $V_L = V_C$ at resonance,the reading of voltmeter $V_4$ will be $|V_L - V_L| = 0$.

In the adjoining $AC$ circuit,the voltmeter whose reading will be zero at resonance is

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