A coil of inductive reactance $31\mathrm{ \Omega }$ has a resistance of $8\mathrm{ \Omega }$. It is placed in series with a condenser of capacitive reactance $25\mathrm{ \Omega }$. The combination is connected to an ac source of $\text{110}\text{V}$. The power factor of the circuit is

• A

  $\text{0}\text{.33}$
• B

  $\text{0}\text{.56}$
• C

  $\text{0}\text{.64}$
• Correct answer
  D

  $\text{0}\text{.80}$

Hence, the correct answer is option: 'D'.