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Two cars \( A \) and \( B \) move along a concentric circular path of radius \( r_{A} \) and \( r_{B} \) with velocities \( v_{A} \) and \( v_{B} \) maintaining constant distance, then \( \frac{v_{A}}{v_{B}} \) is equal to
(a) \( \frac{r_{B}}{r_{A}} \)
(b) \( \frac{r_{A}}{r_{B}} \)
(c) \( \frac{r_{A}^{2}}{r_{B}^{2}} \)
(d) \( \frac{r_{B}^{2}}{r_{A}^{2}} \)
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