A coil of inductive reactance 31 has a resistance of 8 . It is placed in series with a condenser of capacity reactance 25 . The combination is connected to an a.c. source of 110 volt. The power factor of the circuit is:-

1. A. 0.56
2. B. 0.64
3. C. 0.80
4. D. 0.33

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