Angles, arcs and sectors

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Level: 
A
Which of the angles \( \alpha \), \( \beta \), \( \gamma \), \( \delta \) takes the same position on the unit circle as the angle \( APB \)?
\( \gamma = 4.18\,\mathrm{rad} \)
\( \beta = 7.32\,\mathrm{rad} \)
\( \alpha = -7.32\,\mathrm{rad} \)
\( \delta = -4.18\,\mathrm{rad} \)