Which one of the following pairs of equations describes an irreversible heat engine?

Options

• Option A

  $\oint_{}\delta Q>0$ and $\oint\frac{\delta Q}{T}<0$

• Option B

  $\oint\delta Q<0$ and $\oint\frac{\delta Q}{T}<0$

• Option C

  $\oint\delta Q>0$ and $\oint\frac{\delta Q}{T}>0$

• Option D

  $\oint\delta Q<0$ and $\oint\frac{\delta Q}{T}>0$