Correct option is A
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Reactance of the capacitor: At resonance, the inductive reactance is equal to the capacitive reactance, which is why this is the correct answer.
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Impedance of the circuit: At resonance, the impedance of the circuit is equal to the resistance of the circuit, but it is not equal to the inductive reactance.
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Resistance of the circuit: The resistance of the circuit is equal to the impedance at resonance, not the inductive reactance.
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Reactance of the coil: This refers to the inductive reactance, but it does not answer the question about equality at resonance.
Therefore, the correct answer is (a) Reactance of the capacitor.
