If $\sin \alpha = \frac{8}{17}, 0 < \alpha < 90^{\circ}$ and $\tan \beta = \frac{5}{12}, 0 < \beta < 90^{\circ},$ then $\cos (\alpha - \beta)$ is
- A$\frac{210}{221}$
- B$\frac{171}{221}$
- C$\frac{220}{221}$
- DNone of these
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