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

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