If $\sin^{-1} x + \cos^{-1} y = \frac{2\pi}{5}$, then $\cos^{-1} x + \sin^{-1} y$ is

Question

$\frac{2\pi}{5}$

$\frac{3\pi}{5}$

$\frac{4\pi}{5}$

$\frac{3\pi}{10}$

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