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

Question

( A ) 0.33
( B ) 0.56
( C ) 0.8
( D ) 0.64